L3447
Emax DC
86/108
L3728
Model
Scale
Page No.
Doc. No.
Apparatus
1SDH000635R0002
15.1.5.1
PR021/K unit menu table
Protection
Parameter / Function
Values
Notes
PR021K unit
Present
Absent
Leave as Absent if there is no PR021/K
Relay no. 1 / 2 / 3 / 4 / 6 / 7 / 8
Signal source function
None
L Prealarm
L Timing
S Timing
L Trip
S Trip
G Trip
I Trip
Any trip
Custom
- See par. 15.3
Delay
0...100 s step 0.01 s
- Deliberate delay before activating the contact
NO/NC
NO/NC
- Contact normally-open (NO) or normally-closed (NC)
Latch
ON/OFF
- With the contact "ON", once it has been activated it
stays switched.
A specific reset action is needed to reset it
15.1.5.2
Important note
The unit must be connected to the PR122/DC or PR123/DC by means of an internal busbar with a shielded, corded two-wire cable
(see note A, par. 11.2) no more than 15 m long.
The shield must be earthed both on the circuit-breaker side and on the PR021/K side. For the installation and
operation of the PR021/K accessory, refer to the specific user manual.