AIR CIRCUIT BREAKERS - Electrical and Electronics Division

TECHNICAL DATA
SYNCHRONISING RELAYS
Generator Synchronising /
Synchrocheck relays
✦ Display of various parameters, event count & event 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 SPM21 SCM21
Description Auto Synchronising Relay Synchronising Check Relay
Device Code 25 25
Design Numeric Numeric
�unctions Available Auto Synchronising with Synchro Check with
Adjustable voltage, Adjustable voltage
Adjustable �requency, Adjustable �requency
Adjustable Phase angle, Adjustable Phase angle
Adjustable Reclose time, Adjustable Reclose time, Check Synch /
Bus Live / Dead operation Dead line / Dead bus modes of operation,
Speed Regular Control, Over voltage protection, Under voltage
Voltage Regulator Control, protection, Over �requency Protection
Digital inputs to monitor Under frequency protection,
CB position Digital inputs to monitor CB position
Rating 110V - 125 V PT input 110V - 125 V PT input
Other �eatures Display of Parameters, Display of Parameters,
Built in self supervision, Built in self supervision,
RS485 Port RS485 Port
Burden on PT 0.04 VA 0.04 VA
Operating temp 10° to 60° C 10° to 60° C
Weight < 2kg < 2kg
Burden on Auxiliary supply 8.5 VA 8.5 VA
Output Contacts 5 C/O 5 C/O
Construction Drawout Drawout
Dim W x H x D in mm 121 x 158 x 224 121 x 158 x 224
Panel Cutout 113 x 142 113 x 142
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