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1.7. Compliance with Standards
V-Contact contactors comply with the Standards of the major
industrialised countries and in particular with the following
Standards:
– IEC 62271-106 (2011);
– IEC 62271-1 (2007);
– GB/T 14808-2001;
– DL/T 593-2006;
– IEC 60278 replaced by IEC 62271-200;
– IEC 60694 (2002) replaced by IEC 62271-1;
– IEC 60056 (4.104) replaced by IEC 62271-100;
– IEC 60470 replaced by IEC 62271-106.
Characteristics of the contacts of the “Coil Continuity Control” and “Capacity Survey” devices
Technology
Relay with air-insulated contacts
Breaking characteristics:
Maximum breaking power
1200 VA (on resistive load)
Maximum breaking voltage
277 V AC, 30 V DC
Maximum breaking current
3 A
Rated current
5 A @ 4 s
Contact characteristics:
Maximum resistance with contact open
150 mohm (measure of voltage drop 6 V DC 1)
Maximum capacity
1.5 pF
Trip times:
During closing
5.0 ms
During release
2.0 ms
Insulation:
Between contacts and coil
3000 V rms (50 Hz / 1 min.)
Between open contacts
750 V rms (50 Hz / 1 min.)
Resistance with contacts open
Min. 103 Mohm at 500 V DC
1.8. Protection against short-circuit
The value of the installation short-circuit current could exceed
the breaking capacity of the contactor. The contactor must
therefore have adequate protection against short-circuit.
Fuse replacement must only be carried out
by qualified personnel.
NEPSI.COM - Northeast Power Systems. Inc.