AIR CIRCUIT BREAKERS - Electrical and Electronics Division

5
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TECHNICAL DATA
VOLTAGE / �REQUENCY RELAYS, DIRECTIONAL O/C, E/� RELAY
3 Phase voltage / frequency and Load shedding Relay
3 Phase voltage / frequency and zero sequence voltage Relay
✦ Display of various parameters, trip count & trip data on 8 digit alphanumeric display.
✦ Separate LEDs for various fault indication.
✦ �our user programmable output relays.
✦ Built in self supervision & self testing feature help maintenance.
✦ Easy operation by 5 push buttons.
✦ RS 485 port for serial communication with “MSCOM” User friendly software.
Model U�D34 UM30A DM30
Description 3 Ph Voltage & �req. Relay 3 Ph Voltage & �req. Relay 3 Ph Dir O/C & E/� + Highset
Device Code 81, 27, 59, df/dt, de/dt 81, 27, 59, V/Hz, 59d, 59s, 59Uo 50/67 RYBN, 50 LBB
Design Numeric Numeric Numeric
�unctions Available �requency-4 stages selectable Over exitation-2 stages Low Set Dir O/C
as under or over or under/over �requency-2 stages selectable Highset Dir O/C
Voltages - 2 stages selectable as under or over or under/over Low Set Dir E/�
Rate of change of frequency Voltages - 2 stages selectable Trip time Char : NI, VI, EI, Def time
protection df / dt - 2 Stages as under or over CB �ailure �unction
Blocking function Zero Sequence - 2 Stages MTA Setting = 0-359°
Blocking function 1A or 5A site selectable
Rating 100 - 125V PT input 100 - 125V PT input 100 - 125V PT input
Other �eatures Display of Parameters Display of Parameters Display of Parameters
Built in Self supervision Built in Self supervision Built in Self supervision
RS485 Port communication RS485 Port communication RS485 Port communication
Burden on CT Not applicable Not applicable 0.2 VA for 5A, 0.01 VA for 1A
Burden on PT 0.04 VA 0.04 VA 8.5 VA
Operating temp 10° to 60° C 10° to 60° C 10° to 60° C
Weight < 2kg < 2kg < 2kg
Burden on Auxiliary supply 8.5 VA 8.5 VA 0.04 VA
Output Contacts 4 C/O, S/R or H/R or Time del 4 C/O, S/R or H/R or Time del 4 C/O, S/R or H/R or Time del
1 C/O for self supervision 1 C/O for self supervision 1 C/O for self supervision
Construction Drawout Drawout Drawout
Dim W x H x D in mm 121 x 158 x 224 121 x 158 x 224 121 x 158 x 224
Panel Cutout 113 x 142 113 x 142 113 x 142