Hitachi 670 Series Installation Manual page 68

Section 6
Connecting
1. Rated current In = 6 A
2. Tripping characteristic: Z
3. Rated voltage: 400 V AC
4. Rated short-circuit capacity Icu=10 kA
One single-pole MCB that disconnects the secondary circuits from the pole X1 of SIT is also appropriate.
It is advised to equip the MCB with an auxiliary contact for signaling.
A.2 Fuse rated data
An appropriate fuse can be installed close to the X1 terminal of SIT instead of the MCB. There is no need
to install a fuse at the terminal X4 of SIT because it is grounded.
The rated data of the fuse are listed below:
1. Fast acting (F) fuse
2. Voltage rating: 600 V AC
3. Interrupting rating: 50 kA
4. Current rating 5 A
An UL class K5 fuse can be used; check that the fuse properly protects the cables that are wired to the
LV terminals X1-X4 of SIT.
REX060 connections
Table 15:
No
1
2
3
4
5
Table 16:
No
1
2
3
4
5
6
7
8
9
10
Table continues on next page
62
Power X11
Signal
Ready, NO binary out
Common of binary outputs
Fail or power off, NC binary out
Power input positive
Power input negative
Stator IED and sense connection X61
Block injection, 220 V binary in
Block injection, 110 V binary in
Block injection, 48 V binary in
Block injection, Common binary in
Injection Blocked NC binary out
Voltage/Current Saturation NO binary out
Common binary out
Voltage A, analog out
Voltage B analog out
Current A analog out
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Signals
1MRK514026-UUS Rev. P
670 series
Installation manual