ABB REL 356

ABB REL 356 Current Differential Protection
1-5
Product Overview and Specifications
Specifications
Ratings
Nominal ac voltage at 60 Hz 69.3 V rms
Nominal ac current (In) 1 or 5 A rms
Rated frequency 50 or 60 Hz
Maximum permissible ac voltage
Continuous 160 V rms (limited by maximum input to A/D converter)
10 seconds 240 V rms (limited by input transformer flux density)
Maximum permissible ac current
Continuous 3 x nominal current (limited by thermal characteristics)
1 second
Operational 160 A rms at 5 A, 32 A rms at 1 A
(limited by maximum input to the A/D converter)
Thermal 100 x nominal current
dc battery voltages, nominal (range) 60/48 Vdc (30 – 70 Vdc)
110/125 Vdc (88 - 140 Vdc)
220/250 Vdc (176 – 280 Vdc)
dc burdens
normal 15 W
tripping 40 W
ac burdens
volts per phase 0.02 VA at 70 Vac
current per phase 0.45 VA at 5 A
External connections
Terminal blocks located on the rear of the chassis suitable for #14 square tongue lugs. Wiring to FT-14 switches suitable
for #12 wire lugs.
Contact data
Trip contacts
make and carry
1 second 30 A
continuous 10 A
break
resistive 50 W
L/R = 45 msec 25 W
Non-trip contacts
continuous 1 A
resistive interrupt 0.1 A
Contacts meet IEC255-6A, IEC255-12, IEC255-16, BS142-1982