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6.
Note I1=1lnsetting intended the maximum adjustm ent the protection against overloads.3 Replacing electronic release
To complete the procedure for installing PR121/P take the following steps:
1.6. Make sure there are configuration errors ("Alive" LED on). With the circuit-breaker open and possibly disconnected, install the protection unit the circuit-breaker.
E.
With 3-pole CB, with external neutral, the relay performs checks and setting done user.12.
With 4-pole CB, this setting checked the relay which signals any failure means LED (see par.
7. 2
Page No.: With E1B800 having 400A Rating Plug, 800A and 11n, InN adjustment may 50-100-200%. Remove the PR030/B.1 s
5 ains frequency Hz
6 Neutral sel.
39/158
.
2.7. 12.
Model 2234 Apparatus Scale
L 2778
Doc.
4. Actual maximum allowable adjustm ent must take into account any
tem perature derating, term inals used and altitude, (rating plug)< 50% circuit breaker size. 12.1 tra t
The neutral protection normally set current value 50% the adjustment made the phases.2 tra ific tio s
To adjust neutral (InN) comply with the following formula: I1x InN<Iu.1) andindependently adjusts
this parameter, restoring within the accepted limits.
With E1B800 having 800A Rating Plug, 800A and 11n, InN adjustment may 50-100%. Circuit-breaker and release can now put into service. No.
3. *
Note:
* Offfor 3-pole versions
* 50% for 4-pole versions
* 100% for full-size versions
12 tin stru ctio tio service
12.
12.
In some installations, where particularly high harmonics occur, the current circulating the neutral may higher than that the phases.
Failure com ply ith the setting lim its for MI1" and "InN" can dam age the circuit-breaker,w ith consequentrisks the operator
too.6.
A
W ith circu it-b rs, ith external neutral the stm neutral ust set to
O .1), press and hold the Test" button for few seconds until
all the red LEDs start flash confirm that installation complete.1 s
3 -
4 Off 0. there are errors other than the configuration error (see par.
12.5.4PR121/P default settings
The PR121/P supplied ABB SACE with the following preset parameters:
# Protection Tim e
1 144 s
2 Off 0. Power the unit with the PR030/B ONLY. Power the relay from any supply (Vaux, PR030/B, PR010/T).g.
6.7.
5.
In the SACE PR121/P release, this protection can set for the following values: InN Off 50% 100% 200% In
