ABB MDAR Instruction Manual page 14

I.L. 40-385.5
selected by setting the jumpers, JMP1 thru JMP6
and JMP13, on the interconnect module. JMP7 and
JMP9 should always be selected for XTRIPB applica-
tion.
The trip alarm will be sealed-in, until externally reset
(local or remote), if the AL2S (alarm-2 seal-in) is
selected to YES. The relay failure alarm (alarm-1) will
self reset once the abnormal condition has been
removed.
3.4 POWER SUPPLY MODULE
The power supply module provided isolation from the
station battery and includes overcurrent and overvolt-
age protection. Status monitoring (self-check) is
accomplished via a failure alarm relay (AL-1). the fail-
ure alarm relay is normally pickedup, but the proces-
sor de-energize it when a problem is found. Loss of
potential (LOP) and loss of current (LOI) are indi-
cated by a GS reed relay (AL-3) which is normally
de-energized. The GS relay will be picked up for a
total ac power loss. Front panel test points are
included for all power supply voltages. The power
supply module is available in three ranges:
38-70 Vdc 88-145 Vdc
Twelve output relays are also located on the power
supply module. Their functions are:
Relay
K1 Trip A
K2 Trip A
K3 Breaker failure initiate
K4 Carrier stop (STOP)
K5 SRI (RI1)
K6 3RI (RI2)
K7 RB
K8 K1 Breaker current monitor
K9 K2 Breaker current monitor
K10 Carrier send (SEND)
K13 System test
K14 Alarm-3 (GS for LOP & LOI)
* See Section 4 paragraph 4.2 (4) for more information
Contacts from K1 thru K7, K10 and K14 are wired out
for external uses. All trip, BFI, RI1, RI2 and RB con-
tacts are provided for two breaker applications (Fig-
ure 6). The trip output contacts will have a 50 ms.
3-2
176-290 Vdc.
Function
delay on dropout if jumper JMP4 on the processor
module is on. The General Start contact (GB) is pro-
vided for starting the external recorder.
Contacts from K8, K9 and K13 provide inputs to the
microprocessor module. Reed relays K8 and K9 are
built-in the trip circuits for sensing the trip coil current
flow and seal-in the trip output relay if the trip coil cur-
rent is higher than 0.5 amps.
The System Test relay K13 is normally energized
through an external jumper, terminals 13 and 14 on
2FT-14, connected to the DC supply voltage (Figure
5). During system testing K13 is de-energized by
opening an FT switch which disables the reclose ini-
tiate relays, K5 and K6. The above mentioned exter-
nal jumper also direct control the power supply for
the BFI relay K3.
3.5 FILTER MODULE
The filter module contains the anti-aliasing filters for
the analog inputs, IA, IB, IC, IP, VAG, VBG and VCG.
The analog inputs are supplied from the isolation
transformers via the backplane and the interconnect
modules. The filter analog signal outputs are sup-
plied to the microprocessor module. The active low-
pass filters are third-order Butterworth filters with a
cutoff frequency of 240 Hz. This meets the Nyquist
Type Contacts
Telephone
Telephone
Telephone
Reed *1A or 1B
Telephone
Telephone
Telephone
Reed
Reed
Reed *1A or 1B
Telephone
Reed
criterion for the MDAR (REL-300) sampling rate of 8
samples per cycle (480 Hz at 60 Hz and 400 Hz at 50
Hz).
Rating
SPDT 10 A
SPDT 10 A
DPDT 5 A
24 V
DPDT 5 A
DPDT 5 A
DPDT 5 A
Form A 0.5 A
Form A 0.5 A
24 V
DPDT 5 A
1A 24 V