Motor Protection Circuit Breakers - Dhruva Automation & Controls.

sprecher+ 

schuh 

Motor Protection against short 

circuits and overload upto 400 A 

Motor Protection 

Circuit Breakers

World class Controlgear products now in India 

Rockwell Automation a leader in Complete Automation worldwide 

brings Sprecher + Schuh a legendary Swiss brand to India. 

Sprecher + Schuh Low Voltage Controlgear products are also 

manufactured & sold in India, conforming to the strict Swiss quality 

and technology standards. The manufacturing in India fulfils the 

stringent ISO 9002 quality standards under the supervision of 

Rockwell Automation experts. 

All Sprecher + Schuh products have CE, UL, CSA conformance 

that correspond in every respect and meet the applicable 

regulations. Sprecher + Schuh’s world class products are available 

and supported through our nationwide network of channels. With 

the Rockwell Automation back-up you have the assurance of the 

strictest international quality, logistics, distribution and our flexible, 

efficient response to the market requirement any where, any time. 

Buy Reliability. Buy Sprecher+Schuh

Bringing about a revolution in circuit breaker technology 

I [kA] 

80 

70 

60 

50 

40 

30 

20 

10 

0 

0 1 2 3 4 5 6 7 8 9 10 

t [ms] 

Cut-off current 

by KTA 3-100 

Solid short-circuit current 

I K = 50kA eff at 400V 50Hz. 

The difference between type “2” and type “1” 

✔ For type “2”, IEC 947 requires that the starter must 

remain functionally serviceable after a short-circuit 

switch-off. 

✔ For type “1”, the contactor and overload relay may 

be damaged after a short-circuit switch-off. 

Replacement of the motor starter is usually 

necessary. 

Type “2” is therefore the better solution: 

✔ Advantages of type “2”: 

• no reserve starter is required 

• rapid restoration of operation after a short-circuit 

switch-off. 

✔ For modern facilities and controllers, type “2” is the 

clear solution. 

Unique advantages of the KTA 3 

✔ Circuit breakers type KTA 3-100 and above 

automatically give type “2” co-ordination in high 

power industrial systems. 

Modern and simple starter engineering 

✔ Circuit breakers from KTA 3-100 upward make 

configuring starters significantly easier: 

✔ Type “2” short-circuit co-ordinated motors can be 

implemented 

• without oversizing of the power contactors 

• with a minimal volume = space saving in the 

switching cabinet. 

✔ The devices and equipment supplied are 

protected from damage. 

Lightning fast switch-off of short-circuit 

currents 

✔ High current limitation plus extremely short 

switch-off times mean that short-circuit coordinated 

motor starters need no additional motor 

protector. 

Cost-effective and versatile to use 

✔ Genuine integrated motor protection, with 

temperature compensation and differential 

release. 

✔ Rapid return to operational status with no 

replacement parts and no device exchange after 

release by a short circuit. 

✔ Safe operation. 

Type “2” co-ordination without oversized contactors 

Minimises contactor size for type “2” co-ordination 

IEC 947-4-1 type “2” short-circuit co-ordination at 400V 50Hz, 50kA 

Conventional switching device technology (standard circuit breaker + contactor, without thermo-relay) 

[A] 

180 

160 

140 

120 

100 

80 

60 

40 

20 

0 

[kW] 

0 10 20 30 40 50 60 70 80 

KTA 3-25 KTA 3-100 KTA 3-160S 

Nom. motor current Sprecher + Schuh Conventional circuit-breaker technology 

Starter combinations with a KTA3-100 allow the smallest circuit-breaker 

to be used, avoiding expensive and bulky over-sizing

Circuit Breakers KTA 3 Range 

400 / 415 V Rated voltage 

Thermal Magnetic Switching 

release release of three- 

Setting Response phase 

range current/ motors at I cu I cs 3 - pole 4 - pole 

Setting AC-2, AC-3 

[A] range [A] [kW] [kA] [kA] Type designation Type designation 

0.1...0.16 1.8 0.02 100 100 KTA 3-25-0.16A 

0.16...0.25 2.8 0.04 100 100 KTA 3-25-0.25A 

0.25...0.4 4.4 0.06 / 0.09 100 100 KTA 3-25-0.4A 

0.4...0.63 6.9 0.09 / 0.12 100 100 KTA 3-25-0.63A 

0.63...1.0 11 0.18 / 0.37 100 100 KTA 3-25-1A 

1.0...1.6 18 0.37 / 0.55 100 100 KTA 3-25-1.6A 

1.6...2.5 28 0.55 / 0.75 100 100 KTA 3-25-2.5A 

2.5...4.0 44 1.1 / 1.5 100 100 KTA 3-25-4A 

4.0...6.3 69 2.2 / 2.5 100 100 KTA 3-25-6.3A 

6.3...10 110 3 / 5.5 20 16 KTA 3-25-10A 

10...16 176 5.5 / 7.5 10 6 KTA 3-25-16A 

16...20 220 7.5 / 10 8 6 KTA 3-25-20A 

20...25 275 11 / 12.5 8 6 KTA 3-25-25A 

25...40 560 15 / 22 65 50 KTA 3-100-40A 

40...63 882 25 / 31.5 65 50 KTA 3-100-63A 

63..90 1260 37 / 45 50 25 KTA 3-100-90A 

40...50 300...600 25 65 33 KTA 3-160S-50A KTA 3-160S4-50A 

50...63 380...760 31.5 65 33 KTA 3-160S-63A KTA 3-160S4-63A 

63...80 480...960 37 / 45 65 33 KTA 3-160S-80A KTA 3-160S4-80A 

80...100 600...1200 50 / 55 65 33 KTA 3-160S-100A KTA 3-160S4-100A 

100...125 750...1500 63 65 33 KTA 3-160S-125A KTA 3-160S4-125A 

125...160 950...1900 75 / 90 65 33 KTA 3-160S-160A KTA 3-160S4-160A 

125...160 950...1900 75 / 90 65 33 KTA 3-250S-160A KTA 3-250S4-160A 

160...200 1200...2400 110 65 33 KTA 3-250S-200A KTA 3-250S4-200A 

200...250 1500...3000 132 / 150 65 33 KTA 3-250S-250A KTA 3-250S4-250A 

200...250 1500...3000 132 / 150 65 33 KTA 3-400S-250A KTA 3-400S4-250A 

250...320 1900...3800 160 / 185 65 33 KTA 3-400S-320A KTA 3-400S4-320A 

320...400 2400...4800 200 / 220 65 33 KTA 3-400S-400A KTA 3-400S4-400A 

Ics Icu KTA 3-25 KTA 3-100 KTA 3-160S KTA 3-250S KTA 3-400S 

Rated normal breaking capacity 

Rated limiting breaking capacity 

I cu 

I cs 

Still functionally serviceable 

after test with O-t-CO. 

Suitable for normal operation 

after test with O-t-CO-t-CO 

O = break 

CO = restart and break 

t = defined pause

Product information: Circuit Breaker KTA 3 

Technical Data KTA 3-25 KTA 3-100 KTA 3-160S KTA 3-250S KTA 3-400S 

Rated insulating voltage 

IEC, SEV, VDE 0660 [V] 690 690 690 690 690 

UL, CSA [V] 600 600 – – – 

Rated frequency [Hz] 40...60 40...60 40...60 40...60 40...60 

Life 

mechanical [operating cycles] 100 000 30 000 15 000 10 000 8 000 

electrical [operating cycles] 100 000 >10 000 15 000 10 000 8 000 

Switching frequency [op. cycles/h] max. 30 max. 20 max.20 max. 20 max. 20 

Ambient temperature 

storage [°C] – 25...+ 80 – 25... + 80 – 20...+ 60 – 20... + 60 – 20...+ 60 

in operation [°C] – 25...+ 60 – 25... + 60 – 5... + 40 – 5... + 40 – 5...+ 40 

Resistance to climatic change C IV (IEC 68) C IV (IEC 68) (T2-3) IEC 68 (T2-3) IEC 68 (T2-3) IEC 68 

humid heat 40°C, 92%, 56 T. 40°C, 92%, 56 T. 40°C, 93% 40°C, 93% 40°C, 93% 

alternating climatic conditions 23°C, 83% 23°C, 83% 25°C/55°C, 93% 25°C/55°C, 93% 25°C/55°C, 93% 

40°C, 93%, 56 Z. 40°C, 93%, 56 Z. 

Degree of protection IP 20 IP 20 IP 00 IP 00 IP 00 

Impact resistance 30 G, 20 ms 30 G, 20 ms 5 G, 15 ms 5 G, 15 ms 5 G, 15 ms 

Vibration strength 

frequency range [Hz] 10... 150 10... 150 13... 100 13... 100 13... 100 

in all directions [G] >7.5 >7.5 1 1 1 

Thermal rated current I th 

IEC, SEV, VDE 0660 at 40 °C at 40 °C at 40 °C 

at 60 °C ambient temperature [A] 0.1...25 16...90 40...160 125...250 200...400 

Rated current I e 13 setting ranges 4 setting ranges 6 setting ranges 3 setting ranges 3 setting ranges 

[A] 0.1...25 16...90 at 40 °C: 160 at 40 °C: 250 at 40 °C: 400 

at 50 °C: 150 at 50 °C: 235 at 50 °C: 380 

at 60 °C: 140 at 60 °C: 220 at 60 °C: 360 

at 70 °C: 130 at 70 °C: 210 at 70 °C: 340 

Overload protection 

characteristic motor protection motor protection motor protection motor protection motor protection 

temperature compensation [°C] – 20... + 60 – 20... + 60 – 5.. + 40 – 5... + 40 – 5... + 40 

Magnetic release fixed setting fixed setting 

response current 11 x I e max. 14 x I e max. value setting range value setting range value setting range 

Weight [g] 290 1845 3-pole: 2100 3-pole: 4000 3-pole: 5400 

4-pole: 2700 4-pole: 5100 4-pole: 6800 

Dimensions [mm] 

KTA 3 - 25 KTA 3 - 100 

KTA 3 - 160S KTA 3 - 250S KTA 3 - 400S 

1) Mounting possibility on top hat rail EN 50 022-35 2) Auxiliary switch block for building-on KT 3-25-PA 

3) Shunt release KT 3-25-AA or undervoltage release KT 3-25-UA 

Mounting position / Blow fields 

KTA 3-25 KTA 3-160...KTA 3-400S 

KTA 3-100 

Dimensions in ( ) for 4-pole circuit breakers

Time / Current Characteristic 

Tripping time [s] 


Thermal release trip 

current: 

The adjustable inverse 

bimetal trip reliably protects 

motors against overloads. 

The curve shows the mean 

operating current at an 

ambient of 20 C starting from 

cold for KTA 3-25, KTA 3-100 

and 25 C for KTA 3-160S, KTA 

3-250S and KTA 3-400S. 

Careful testing and setting 

ensures effective motor 

protection even in the case of 

single-phasing. 

Circuit-breaker KTA 3-25 Circuit-breaker KTA 3-100 

Multiple of the set current I eF 

Circuit-breaker KTA 3-160S 










Magnetic release trip 

current: 

The instantaneous magnetic 

trip has a fixed operating 

current setting for KTA 3-25 

and KTA 3-100. This 

corresponds to 11 times (for 

KTA 3-25) and 14 times (for 

KTA 3-100) the highest setting 

of the thermal overload trip. 

The instantaneous magnetic 

trip for KTA 3-160S, KTA 3- 

250S and KTA 3-400S are 

adjustable.

Accessories: Circuit Breaker KTA 3-25 

Current limiter KTL 3-65-N 

u Improved switching capacity 

u No back-up fuse necessary 

u Reliable in function 

u Repulsion contacts close automatically 

u For single and group protection 

u When used compact bus-bars beside KTA 3-25 

KTL 3-65-N serves as supply block 

Auxiliary switch blocks 

for flush mounting 

u No extra space needed 

1 Normal contact designation 

2 Higher contact designation 

L Early-make contact 

add on lefthand side 

2-pole 

Use compact bus-bar with pitch 

54 mm 

Release control switch blocks 

for flush mounting 

u Indicate tripping of the circuit 

breaker 

u No extra space needed 

Technical Data KT 3-25-PE, KT 3-25-PA, KT 3-25-PF 

u For locking the START button 

u For locks ring diameter f 8 mm 

KTA 3-25 KT 3-25-... 

PF-10 PF-01 


at 40 C ambient temperature 6 A 

at 60 C ambient temperature 4A 

Contact class according NEMA AC B 600 Standard Pilot Duty 

(UL / CSA-standards) DC R 300 Light Pilot Duty 

Back-up fuse gl, gL 16 A 

Undervoltage release / Shunt release 

KT 3-25-UA KT 3-25-AA 

add on 

righthand side 

Contact diagrams 

KTA 3-25 KT 3-25-... KTA 3-25 KT 3-25... 

UA-...V.. AA-... V.. 

Technical Data KT 3-25-UA...V.. KT 3-25-AA...V.. 

Operating voltage 

Pull-in 0.8...1.1 x U s 0.7... 1.1 x U s 

Drop-out 0.7...0.35 x U s – 

On-time 100% ED 100% ED 

Rated control voltage 

min.: 12 V 50 Hz/14 V 60 Hz 12 V 50 Hz/14 V 60 Hz 

max.: 600 V 50 Hz 600 V 50 Hz 

Coil rating KT 3-25-UA...V.. KT 3-25-AA...V.. 

Pull-in 8.5 VA, 6 W 8.5 VA, 6 W 

Hold 3 VA, 1.2 W 3 VA, 1.2 W 

Weight 104 g 100 g 

Locking device 


KTA 3-25 KT 3-25-... 

KTA 3-25 KT 3-25-... 

Weight 11 g 

PE1-10 PE2-10 PE1-01 PE2-01 PE-L10 

PA-20 PA-02 PA-11 

Type designation 

KTL 3-65-N 

Technical Data 

Rated voltage 690 V 

Continuous current 65 A 

Weight 210 g 


KT 3-25-PE1-10 

KT 3-25-PE2-10 

KT 3-25-PE1-01 

KT 3-25-PE2-01 

KT 3-25-PE-L10 


KT 3-25-PA-20 

KT 3-25-PA-11 

KT 3-25-PA-02 


KT 3-25-PF-10 

KT 3-25-PF-01 

Rated current 230/240 V 400/415 V 500 V 690 V 

AC-15 2 A 1 A 0.8 A 0.5 A 

24 V 48 V 110 V 230 V 

DC-13 2 A 0.6 A 0.2 A 0.1 A 

Weight KT 3-25-PE 12 g 

KT 3-25-PA 35 g 

KT 3-25-PF 13 g 


KT 3-25-UA-... 

24 V 50/28 V 60 

110 V 50/127 V 60 

220...230 V 50/240...260 V 60 

240 V 50/277 V 60 

380...440 V 50/440..460 V 60 

400 V 50/480 V 60 

KT 3-25-AA-... 

24 V 50/28 V 60 

110 V 50/127 V 60 

220...230 V 50/240...260 V 60 

240 V 50/277 V 60 

380...440 V 50/440...460 V 60 

400 V 50/480 V 60 


KT 3-25-DSC

Accessories: Circuit Breakers KTA 3-25 and KTA 3-100 

Supply blocks Type designation 

KT 3-25-A2 KT 3-25-A3 

Compact bus-bars 

Accessories for KTA 3-100 


for front mounting 

u No extra space 

needed 

Release control switch blocks 


u Indicates tripping of 

the circuit breaker 

u No extra space 

needed 

Technical Data KT 3-100-PF, KT 3-100-PE 

u Pitch 45 mm for circuit breaker with internal 

auxiliary switch block 

42 g with 2 x 3 connecting ways 



u Pitch 54 mm for circuit breaker with addedon 

auxiliary switch block 

45 g with 2 x3 connecting ways 




KTA 3-100 KT 3-100-... 

Rated current 230 V 400 V 500 V 690 V 

AC-15 3 A 2.5 A 1.5 A 0.75 A 

24 V 48 V 110 V 230 V 440 V 

DC-13 2 A 0.6 A 0.2 A 0.1 A 0.04 A 

Thermal rated current Ith at 40 C ambient temperature 10 A 

at 60 C ambient temperature 

Under-voltage release / Shunt release 

6 A 


Supply block KT 3-25-A2 Supply block KT 3-25-A3 

1) Mounting possibility on top hat rail EN 50 022-35 

u Integrated short 

circuit indicator with 

isolated signalling 

KTA 3-100 KT 3-100-... 

PE-20 PE02 PE-11 

Sophisticated signalling: 

a) Overload release 

b) Short circuit release 


KTA 3-100 KT 3-100-.. KTA 3-100 KT 3-100-... 

UA-......V.. AA.....V. 

b) Short circuit release 

Technical Data KT 3-100-UA...V... KT 3-100-AA...V.. 

Operating voltage 

Pull-in 0.8...1.1 x U s 0.7...1.1 x u s 

Drop-out 0.7...0.35 x U s 

Rated control voltage 

min.: 12 V 50 Hz/14 V 60 Hz 12 V 50 Hz/14 V 60 Hz 

max.: 600 V 50 Hz 600 V 50 Hz 

PF-20 PF-02 PF1-11 PF2-11 

KT 3-25-A2 

KT 3-25-A3 

Weight KT 3-25-A2 151 g 

KT 3-25-A3 36 g 


KT 3-25-DB-45-2 

KT 3-25-DB-45-4 

KT 3-25-DB-45-5 

KT 3-25-DB-54-2 

KT 3-25-DB-54-4 

KT 3-25-DB-54-5 


KT 3-100-PE-20 

KT 3-100-PE-02 

KT 3-100-PE-11 


KT 3-100-PF-20 

KT 3-100-PF-02 

KT 3-100-PF1-11 

KT 3-100-PF2-11 

Contact classe according NEMA AC B 600 Standard Pilot Duty 

(UL / CSA-standards) DC R 300 Light Pilot Duty 

Back-up fuse gl, gL 16 A 

Weight 31 g 


KT 3-100-UA-24 V 50 

KT 3-100-UA-110 V 50 

KT 3-100-UA-220 V 50 

KT 3-100-AA-24 V 50 

KT 3-100-AA-110 V 50 

KT 3-100-AA-220 V 50 

On-time 100% ED 

Coil rating 

Pull-in upon request 

Holding upon request 

Weight 94 g

Accessories: Circuit Breakers KTA 3-100 and KTA 3-160S(4)... KTA 3-400S(4) 

Lockable twist knob for KTA 3-100 

u For 3 padlocks f 4...8 mm 

u Lockable in 0-position 

Weight 17 g 

Components for KTA 3-160S(4)...KTA 3-400S(4) 


for front mounting in the 1st contact circuit 

KT 3-160-PE-1W KT 3-400-PE-1W 

Auxiliary switch – and release 

control switch block 

for front mounting in the 1st contact 

circuit 

Release control switch block 

for front mounting in the 1st contact 

circuit 

Technical Data KT 3-160/400-PE/PE-PF/PF 


KTA 3-160S KT 3-160-... 

KTA 3-250S KT 3-400-... 

KTA 3-400S KT 3-400-.. 

PE-1W PE-2W 

KTA 3-160S KT 3-160-... KTA 3-160S KT 3-160-... 

KTA 3-250S KT 3-400-... KTA 3-250S KT 3-400-... 

KTA 3-400S KT 3-400-... KTA 3-400S KT 3-400-... 

PE-PF PF 




Rated current I e 110 V 230/240 V 400/415 V 

AC-15 3 A 2 A 1 A 

48 V 110 V 230 V 

DC-13 0.5 A 0.2 A 0.1 A 

Under-voltage release / Shunt release 

for flush mounting in the 

third contact circuit 

KT 3-160-UA-... V.. KT 3-400-UA-... V.. 

Colour Type designation 

black KT 3-100-KN 

red/yellow KT 3-100-KRY 

KT 3-160... Accessories for KTA 3-160S 

KT 3-400... Accessories for KTA 3-250S / KTA 3-400S 


KTA 3-160S KT 3-160-... KTA 3-160S KT 3-160-... 

KTA 3-250S KT 3-250-... KTA 3-250S KT 3-250-... 

KTA 3-400S KT 3-400-.. KTA 3-400S KT 3-400-... 

UA-...V.. AA-...V.. 

Technical Data KT 3-160-UA KT 3-400-UA KT 3-160-AA KT 3-400-AA 

Operating range 

switching on 0.85...1.1 x U s 0.85...1.1 x U s — — 

switching off 0.7...0.35 x U s 0.7...0.35 x U s 1.1...0.5 x U s 1.1...0.5 x U s 

Power absorbed 

AC 2.7 VA 4.5 VA 330 VA 380 VA 

DC – 2 W 330 W 380 W 

Weight 63 g 63 g 64 g 64 g 


KT 3-160-PE-1W 

KT 3-400-PE-1W 

KT 3-160-PE-2W 

KT 3-400-PE-2W 

KT 3-160-PE-PF 

KT 3-400-PE-PF 

KT 3-160-PF 

KT 3-400-PF 

Weight KT 3-160/400-PE-1W 34 g 

KT 3-160/400-PE-2W 60 g 

KT 3-160/400-PE-PF 52 g 

KT 3-160/400-PF 31 g 


KT 3-160-UA../KT 3-400-UA 

24 V 50/60 

110... 127 V 50/60 

208... 240 V 50/60 

380... 480 V 50/60 

24 VDC 

110... 127 VDC 

220... 250 VDC 

KT 3-160-AA-.../KT 3-400-AA 

24 V 50/60 

110...127 V 50/60 

208... 240 V 50/60 

380... 480 V 50/60 

24VDC 

110... 127 VDC 

220... 250 VDC

Accessories: Circuit Breakers KTA 3-160S(4)... KTA 3-400S(4) 

Lockable twist knob handle 

For KT 3-400-... declared value in ( ) 

Locking device for toggle operator 

u Lockable with padlock 

u Prevents unauthorized operation 

Terminal cover 

Door-mounted handle with interlock 

Enclosures (For KTA 3-25) 

u Shock protection 

u For mounting in doors, covers, 

enclosures 

u Lockable with 3 padlocks f 6...8 mm in 

ON or OFF-position 

u To be mounted together with lockable 

twist knob and extention shaft 

Weight Lockable knob 250 g 

Extention shaft 100 g 

Lockable twist knob 

operating mechanism 

Door-mounted handle with 

interlock 

Extention shaft 

KT 3-400-HT 


black/grey KT 3-160-HN 

red/yellow KT 3-160-HRY 

black/grey KT 3-400-HN 

red/yellow KT 3-400-HRY 

Weight 400 g 


KT 3-160-DS 

Weight 30 g KT 3-400-DS 


KT 3-160-HA 

KT 3-250-HA 

Weight 30 g KT 3-400-HA 

u Pre-stamped for 2 signal lamps and including terminals for ground and neutral conductors 

Technical data 

Degree of protection 

KT 3-25-KA IP 41 

KT 3-25-KAZ with seal and protection diaphragm IP 55 

Ambient temperature -25 C... 40 C 

Installation of unit 

Circuit breaker including auxiliary switch block 

and release control switch block snap-on 

Fitting 

Mounting holes 5 mm 

Outside sealed zone 2 

Cable entries 

Double-step cut-outs PG 16 (Ø 23 mm) or PG 21 (Ø 29 mm) 2 top. 2 bottom 


red/yellow KT 3-400-HTRY 

red/yellow KT 3-400-HTRYS* 

Extention shaft 

KT 3-400-HT 

*Security switch for automotive industry 

Type [mm] with extention shaft 

by by 

reducing shifting 

a a min. a min. a max. 

KTA 3-160S(4) 171 201 284 301 

KTA 3-250S(4) 185 225 298 315 

KTA 3-400S(4) 185 225 298 315 

Type designation Weight 

KT 3-25-KA 250 g 

KT 3-25-KAZ 258 g 

Dimensions [mm]

SHORT CIRCUIT CO-ORDINATION SELECTION CHART 

Contactors : S + S CA3/4/6 Circuit Breakers : S+S KTA 3-25…400 

RATED OPERATIONAL VOLTAGE U e : 415 V, 50 Hz 

TEST VOLTAGE = 415+5% : 436 V, 50 HZ 

RATED CONDITIONAL S.C. CURRENT Iq : 65 kA (rms symmetrical) 

AS PER IEC 947-4-1 (1990) 

TYPE-2 DIRECT-ON-LINE STARTING 

NOM. MOTOR 

RATING/CURRENT 

CIRCUIT BREAKER CONTACTOR 

4-POLE 415V/1500 RPM MOTORS 

Rating Current Type Thermal Magn. Type I AC-3 

(kW) (A) (A) (A) (A) 

0.19 0.60 KTA 3-25 0.40-0.63 6.9 CA 4-5/CA 3-9 5.3/9 

0.25 0.80 0.63-1.00 11.0 CA 4-5/CA 3-9 5.3/9 

0.37 1.10 1.00-1.60 18.0 CA 4-5/CA 3-9 5.3/9 

0.55 1.50 1.00-1.60 18.0 CA 4-5/CA 3-9 5.3/9 

0.75 1.80 1.60-2.50 28.0 CA 4-5/CA 3-9 5.3/9 

1.10 2.60 2.50-4.00 44.0 CA 3-16 16 

1.50 3.40 2.50-4.00 44.0 CA 3-16 16 

2.20 4.80 4.00-6.30 69.0 CA 3-23 23 

3.00 6.50 6.3-10.00 110.0 CA 3-23 23 

4.00 8.20 6.3-10.00 110.0 CA 3-23 23 

3.00 6.50 KTA 3-25+KTL 6.30-10.0 110.0 CA 3-16 16 

4.00 8.20 6.30-10.0 110.0 CA 3-16 16 

5.50 11.00 10.0-16.0 176.0 CA 3-23 23 

7.50 14.00 10.0-16.0 176.0 CA 3-23 23 

9.00 17.00 16.0-20.0 220.0 CA 3-23 23 

11.00 21.00 20.0-25.0 275.0 CA 3-23 23 

15.00 28.00 KTA 3-100 25.0-40.0 560.0 CA 3-30 30 

18.50 34.00 25.0-40.0 560.0 CA 3-37 39 

22.00 40.00 25.0-40.0 560.0 CA 3-43 45 

30.00 55.00 40.0-63.0 882.0 CA 3-60 60 

37.00 66.00 63.0-90.0 1260 CA 3-72 72 

45.00 80.00 KTA-3-160S 80-100 1200 CA 6-85 85 

55.00 100.00 100-125 1500 CA 6-105 105 

75.00 135.00 125-160 1900 CA 6-140 140 

90.00 160.00 125-160 1900 CA 6-170 170 

110.00 200.00 KTA 3-250S 160-200 2400 CA 6-210 210 

132.00 230.00 200-250 3000 CA 6-250 250 

160.00 270.00 KTA 3-400S 250-320 3800 CA 6-300 300 

200.00 350.00 320-400 4800 CA 6-420 420 

TYPE-2 STAR-DELTA STARTING 

NOM. MOTOR RATING/ CIRCUIT BREAKER CONTACTOR CONTACTOR 

CURRENT Main & Delta Star 

4-POLE 415V/1500 RPM MOTORS 

Rating Line Phase 

(kW) (A) (A) Type Thermal Magn. Type I AC-3 Type I AC-3 

(A) (A) CA. (A) CA (A) 

1.50 3.40 2.00 KTA 3-25 2.50-4.00 44.0 3-16 16 3-9 9 

2.20 4.80 2.77 4.00-6.30 69.0 3-23 23 3-9 9 

3.00 6.50 3.75 KTA 3-25 + 6.30-10.0 110.0 3-16 16 3-9 9 

4.00 8.20 4.73 KTL 3-65 6.30-10.00 110.0 3-16 16 3-9 9 

5.50 11.00 6.35 10.0-16.0 176.0 3-23 23 3-9 9 

7.50 14.00 8.08 10.0-16.0 176.0 3-23 23 3-9 9 

9.00 17.00 9.81 16.0-20.0 220.0 3.23 23 3-9 9 

11.00 21.00 12.10 20.0-25.0 275.0 3-23 23 3-9 9 

15.00 28.00 16.20 KTA-3-100 25.0-40.0 560.0 3-30 30 3-12 12 

18.50 34.00 19.60 25.0-40.0 560.0 3-30 30 3-12 12 

22.00 40.00 23.10 25.0-40.0 560.0 3-30 30 3-16 16 

30.00 55.00 31.80 40.0-63.0 882.0 3-43 45 3-23 23 

37.00 66.00 38.10 63.0-90.0 1260 3-72 72 3-30 30 

45.00 80.00 46.20 KTA 3-160S 80-100 1200 6-85 85 3-30 30 

55.00 100.00 57.70 100-125 1500 6-85 85 3-37 39 

75.00 135.00 77.90 125-160 1900 6-140 140 3-60 60 

90.00 160.00 92.40 125-160 1900 6-140 140 3-60 60 

110.00 200.00 116.00 KTA 3-250S 160-200 2400 6-210 210 6-85 85 

132.00 230.00 133.00 200-250 3000 6-250 250 6-85 85 

160.00 270.00 156.00 KTA 3-400S 250-320 3800 6-300 300 6-105 105 

200.00 350.00 202.00 320-400 4800 6-420 420 6-140 140

Pub: S+S/MPCB/INDIA/001 

CALCUTTA 

Allen-Bradley India Limited 

III Floor, 

Shivam Chambers 

No. 53, Syed Amir Ali Avenue 

Calcutta-700 019 

Tel : (91)-33-2405274 

(91)-33-2407557 

(91)-33-2400650 

Fax: (91)-33-2405263 

MUMBAI 


C-312, Gokul Arcade 

Abasheb Garware 

Vile Parle (East) 

Mumbai-400 052 

Tel : (91)-22-8377044 

(91)-22-8377051 

(91)-22-8377108 

(91)-22-8208229 

(91)-22-8377820 

(91)-22-8378229 

Fax: (91)-22-8377049 

CHANDIGARH 

Tel : (91)-172-678526 

(91)-9814027002 

sprecher + schuh range of products: 

Our Offices in India : 

Registered Office : 

Factory and Northern 

Region Sales Office 

SAHIBABAD 


C-11, Industrial Area 

Site-IV, Sahibabad-201 010 

Tel : (91)-120-4777489-95, (91)-120-4771113 

Fax: (91)-120-4771115, (91)-120-4770822, (91)-98102-42014 

PUNE 


II Floor, Chaitraban 

Pune-Mumbai Road, Wakadewadi 

Pune-411 042 

Telefax : (91)-20-5512921-22 

(91)-20-5512323 

(91)-20-4001370 (D) 

VADODARA 


4, Shrey Nager, Vibhag-1, 

Behind Alembic Stores, 

Subhanpura, Vadodara-390 023 

Tel : (91)-265-386315 

Telefax: (91)-265-386110 

(91)-9824077871 

BANGALORE 


No. 105, Parvathi Plaza 

Richmond Road 

Bangalore-560 025 

Tel : (91)-80-2244818 

Resident Engineers at following locations: 

AHMEDABAD 

Tel : 9824060339 

(079)-5461374 

(91)-80-2243256 

(91)-80-2291585 

(91)-80-2246603 

Fax: (91)-80-2244743 

CHENNAI 


2 J, Second Floor 

Mount Chambers 

758, Mount Road 

Chennai-600 002 

Tel : (91)-44-8551872 

(91)-44-8594116 

(91)-44-8594117 

Fax: (91)-44-8551888 

SECUNDERABAD 


102 & 103, Hanuman Sharan 

Aprts, Park Avenue Colony 

Prender Ghast Road 

Secunderabad-500 003 

Tel : (91)-40-7841556 

Telefax: (91)-40-7841396 

● Motor Protection Circuit Breakers ● Thermistor Protection Relays 

● Contactors and Control Relays ● Electronic Motor Protection Relays 

● Thermal Overload Relays ● Electronic Motor Control and Protection System 

Bringing Together Leading Brands in Industrial Automation 

Specifications subject to change. 

COIMBATORE 

Tel : (91)-422-498188 

Fax: (91)-422-493394

Motor Protection Circuit Breakers - Dhruva Automation & Controls.

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