ABB REL 356

ABB REL 356 Current Differential Protection
1-6
Product Overview and Specifications
Binary (Voltage) Input Circuits
Jumper selectable 48, 125 or 250 Vdc
Drop-out threshold 67%
9600 bps Audio Tone Communication Interface
Operating speed 9600 bps
Standards compliance ITU V.29
Carrier frequency 1,700 Hz
Modulation QAM – Quadrature Amplitude Modulation
Transmit level - 1 dBm to – 15 dBm in 2 dBm steps
Receiver sensitivity - 33 dBm
Channel requirement 4 wire, unconditioned
56/64 kbps Digital Communication
Operating speed 56 or 64 kbps, selectable
Direct digital option
Electrical standard RS422/RS485
Mechanical standard RS530
Maximum distance 4000’/1300 m
Fiber optic options
Connector ST
Wave length 820 nm
Cable multi-mode
Transmitter output into 50/125 mm cable - 18 dBm minimum
Receiver input - 28 dBm minimum
Reach, typical 2 miles/3.3 km
Wave length 1300 nm
Cable single-mode
Transmitter output into 9/125 mm cable
Short reach option - 20 dB minimum
Reach, typical 7.5 miles/12 km
Medium reach option - 10 dB minimum
Reach, typical 20 miles/32 km
Long reach option 0 dB minimum
Reach, typical 32 miles/52 km
Receiver input - 32 dBm minimum
- 20 dBm maximum
*
* Receiver maximum input is determined by receiver saturation and should not be exceeded. An attenuator is
delivered to facilitate back-to back testing. The received level should be adjusted to – 26 dBm.
Optional G.703 Interface
The optional G.703 interface adapter complies with CCITT (ITU) G.703 co-directional, 64 kbps specification. For
details refer to IL 40-201.7