A200 - Electrical Part Manuals

Type MOR Modular Overload Relay
The Westinghouse Modular Overload Relay
(MOR) is a three-pole overload relay with
discrete solid state components. The MOR
consists of three small current transformers,
an output circuit and overload logic. The
CT's monitor all three phases and provide
basic input to the ove rload. This same input
is used to communicate to the special function
modules. The overload and/or special function
modules then send a trip signal to the
isolated NC contact. A plug-in heater module
protects all three phases and aLE D provides
positive trip indication. The MOR will operate
in ambient temperatures ranging from -30'C
to +80'C.
Plug-in modules are available for such
special functions as Phase Unbalance, Long
Acceleration, Underload and Jam.
List Prices, Panel Mounted (Dis. C1 0-S1 9)
Full load Max Hp, Catalog List
4BO Volts Number Price
3.B·25 10 MOR·l $100
6.5-43 15 MOR·2 100
20.5·135 100 MOR·4 100
HTM Heater Modules
HTM plug-in heater modules maintain a
closer tri p tolerance than do thermal overload
relays. Only one module is needed to
protect all three phases of the motor in ambients
ranging from -30'C to +80'C.
Heater list Price: $9 each. Discount Cl 0-S1 9
Heater Selection
Each heater module is identified by a catalog
number. The application table at right indicates
the range of full load motor current to
which a given heater may be applied. Heaters
should be selected on the basis of the actual
full load current and service factor as shown
on the motor nameplate or in the manufacturers
published literature.
Heater Module Application Table
Heater
Cat.
No.
HTM03
HTM04
HTM05
HTM06
HTM07
HTMOB
HTM09
HTM10
HTMl l
HTM12
HTM13
HTM14
HTM15
HTM16
HTM 17
HTM1 8
HTM1 9
HTM20
HTM21
HTM22
HTM23
HTM24
HTM25
HTM26
HTM27
HTM28
HTM29
HTM30
HTM31
HTM32
Motor Full Load Amperes
'r;XoRT--�2 ��'M0R-4 -
2.6 2.B 4.4 - 4.7 14.4 15.2
2.8 3.05 4.7 · 5.1 15.2 16.7
3.05 · 3.3 5.1 5.6 16.7 - 18.2
3.3 - 3.5 5.6 59 lB.2 . 19.1
3.5 · 3.7 5.9 · 6.2 19.1 20.0
3.7 3.9 6.5 20.0 21 .1
3.9 - 4.1 6.8 21 .1 22.1
4.1 . 4.3 6.8 7.2 22.1 - 23.5
4.3 · 4.6 7.2 7.7 23.5 - 24.6
4.6 . 4.9 7.7 8.2 24.6 26.5
4.9 · 5.3 8.2 - 8.9 26.5 28.2
5.3 5.7 8.9 . 9.4 28.2 29.9
5.7 - 6.2 9.4 10.1 29.9 · 32.2
6.2 - 6.6 10.1 11.1 32.2 · 34.5
6.6 · 7.2 11.1 12.0 34.5 · 37.5
7.2 · 7.7 12.0 - 1 3.1 37.5 · 40.8
7.7 8.2 13.1 . 13.8 40.B - 42.6
8.2 - 8.7 13.B · 14.4 42.6 44.6
8.7 - 9.0 14.4 • 15.0 44.6 · 45.1
9.0 · 9.5 15.0 15.8 45.1 - 48.2
9.5 · 10.2 15.8 · 17.0 48.2 - 51 .2
10.2 11.0 17.0 - 1 8.1 51.2 • 55.0
11.0 - 11.7 1 B.l - 19.5 55.0 - 59.0
11.7 - 12.6 19.5 21 .2 59.0 - 63.3
12.6 · 13.B 21 .2 . 23.2 63.3 · 68.9
13.8 • 15.1 23.2 - 25.0 68.9 75.7
15.1 16.7 25.0 . 28.2 75.7 84.0
16.7 - 1 8.6 2B.2 31 .8 84 95
18.6 . 21 .5 31.8 37.1 95 - 107.5
21 .5 . 25.4 37.1 . 42.5 107.5 - 130
8220 CWE A
Catalog Section
Page 17
Overload Relay Curve
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200 300 400 500 600 700
Current, % of Heater Ra!ing
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