ABB REL 352, Инструкция по эксплуатации

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Power Automation and Protection Division I.L. 40-201.9
REL 352 Version 1.00 A-1
A
A
P
P
E
N
D
I
X
BACKPLANE MODULE
Schematic - - - - - - - - - - - - - - - - - - - - - 1612C22
Component Location Diagrams - - - - - - 1611C26, 1502B38
All external electrical connections pass thru the Backplane module (see Figure 4-1) of the outer chassis. Seven
DIN connectors (J11, J12, J13, JA1, JA2, JA3 and JA4) allow for the removal of the outer chassis (Backplane
module) from the inner chassis (Interconnect module, Contact Input and Relay Output modules).
Electrical inputs to the Backplane module, which are routed through the FT-14 switch to the Backplate, include:
• V
A
, V
B
, V
C
, and V
N
• I
A
/I
AR
, I
B
/I
BR
, I
C
/I
CR
• BP(48, 125 or 250 Vdc) and BN (common) for primary and backup power inputs.
The Backplane module, (see Figure A-1 and Schematic) contains three voltage-type transformers, for V
A
/V
N
(V
AN
), V
B
/V
N
(V
BN
), V
C
/V
N
(V
CN
) inputs.
A Transformer module (see Figure A-2 and Schematic) is piggybacked onto the Backplane module, consisting
of three current-type transformers (I
A
, I
B
, I
C
) with three 0.1% resistors. The primary windings of all six transform-
ers are directly-connected to the input terminal (TB6/1 thru 10); the secondary windings are connected thru
the Interconnect module to the Analog Input module. The current transformers (I
A
, I
B
, I
C
) are not gapped; dc
offset attenuation is done with a digital filtering algorithm. Surge suppression is included where the signals enter
the module.
The Backplane module also includes:
• 4 chokes (L1 thru L4) for dc power supply filter
• surge-suppressor capacitors
INCOM/PONI is supplied in two versions:
• INCOM/PONI to RS232 computer interface (supplied as standard).
• INCOM/PONI to INCOM network interface (supplied as option).