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CHAPTER 2: USING THE RTT ON SR SERIES RELAYS
THE SR489 GENERATOR MANAGEMENT RELAY
RTT DESKTOP TEST SET– INSTRUCTION MANUAL
31
2.3.4
RTT to SR489 Wiring Diagram
1.
Ensure that Wet/Dry Input Type switch is set to
DRY
before applying power to the RTT
unit. The SR489 Relay accepts only
DRY
contact connections to the RTT.
2.
Ensure that current and voltage knobs are turned fully counter-clockwise before
applying power to the RTT unit.
Note
*Trip and Alarm Common terminals (F1 and F7) must be hardwired together.
Table 2–3: SR489 with RTT Set to Dry
RTDs
RTD 3 +
A6
-------------------------
RTD3 +
RTD 3 -
A8
-------------------------
RTD3 -
RTD 3 COM
A7
-------------------------
RTD3 C
RTD 2 +
A5
-------------------------
RTD2 +
RTD 2 -
A3
-------------------------
RTD2 -
RTD 2 COM
A4
-------------------------
RTD2 C
RTD 1 +
A1
-------------------------
RTD1 +
RTD 1 -
A3
-------------------------
RTD1 -
RTD 1 COM
A2
-------------------------
RTD1 C
SPARE
Contact
Outputs*
ALARM COMMON
F7
---------------
RTT
TRIP COMMON
F1
-------------------------
OUTPUT C
ALARM NO
E8
-------------------------
OUTPUT 2
TRIP NO
E2
-------------------------
OUTPUT
1
Contact
Inputs
Switch Common
D23
-------------------------
INPUT C
Assignable #6
D21
-------------------------
INPUT 8
Assignable #5
D20
-------------------------
INPUT 7
Assignable #4
D19
-------------------------
INPUT 6
Assignable #3
D18
-------------------------
INPUT 5
Assignable #2
D17
-------------------------
INPUT 4
Assignable #1
D16
-------------------------
INPUT 3
Access
C1
-------------------------
INPUT 2
Breaker Status
C3
-------------------------
INPUT
1
CTs
Ia +
G6
I
+
Ia COM
H6
I
-
VTs
VA
G2
V
+
Vn
G1
V
-