39
Instruction Leaflet
IL01301051E
effective September 2013
Operating Manual for Series NRX
Trip Units - Digitrip™ 520/520M
EATON
www.eaton.com
NNoes fNr pages 36 and 37 (Diagram drawing number 6D32424 - RF Frame)
1.
All contacts shown with circuit breaker open and discharged and control power de-energized. The OTS are shown in reset position.
2.
All trip unit wires are #22 AWG—0.34 mm
2
—300V.
3.
All accessory wires are #18 AWG—0.82 mm
2
—600V.
4.
92 contacts maximum.
5.
Contacts 14, 30, 31 and 32, 47, 48 not used.
6.
Connectors K15 and K16 are not always present.
7.
On three-pole circuit breakers only, connector K4—1.2 wires only are wired out to secondary contacts.
8.
Odd number contacts have guide rib on black housing.
9.
Zone interlock wiring shown dotted—optional jumper is standard.
10. Latch check switch can be wired either externally (option) or internally (option) to a spring release accessory. Wiring LCS internally
ensures the one-shot pulse provided by the SR circuitry is made active only after the mechanism spring is charged and the latch is in its
proper state.
11.
For accessories having a DC rating, the odd numbers will be treated as positive voltage.
12. Reserved for spring charge SC input contact.
13. For Digitrip 520M ALM2 is used for GF (ground fault style trip unit) or high load alarm (non-ground fault style trip unit). ALM1 is used for
diagnostic alarm or maintenance mode active. For Digitrip 1150, these contacts can be programed as desired.
