Poznámky redaktora
The function entirely similar the one described the
PR120/K signalling module par.1..
By setting the DIP switches, you can configure the signals programmable contacts, This can done selecting them directly the PR121
relay via PR010/T, SD-Testbus SD-Pocket; PR122/P PR123/P relay, choosing from long list, including: directional protection trip minimum
and maximum voltage trip and OV, reverse power trip and others....
Two contacts available the SACE PR021/K (load control) unit enable you control arelease for opening and closing the circuit-breaker. A
Breaking capacity 380 VAC .
The following signals/contacts are available:
- overload prealarm (the alarm signal remains enabled throughout the overload, until the release has been tripped)
- protections timing and trip (the protections trip signal remains enabled during the timing-controlled phase and after the release has been tripped)
- protection trip
- timing and overheating threshold overrun
- two contacts for load control
- release trip
- communication error serial line (connections between protection and signalling units)
- phase unbalance.1 eneral inform ation
The signalling unit converts the digital signals provided the protection units into electrical signals means normally-open electric contacts.
Breaking capacity 120 VDC 0.
Information the status the protection functions transits dedicated serial line connected the release.1.
16...
125/158
.3 General characteristics the signalling relays
The following data are defined for resistive loads (cos 1)
Type contact SPST
Maximum switching voltage 130 VDC 380 VAC
Maximum switching current A
Maximum switching power 175 2000 VA
Breaking capacity VDC .
A Reset button enables you zero the status all the front optical signals and return the relays' contacts the resting position.2 .1 llin it
16..
16.4 Relay functions
The available contacts can used manage the respective relays indicating event given situation the state the device) that prompts
the required relays independently enabled after the delay specified the user.2 A
Contact/coil insulation 4000 Veff
Contact/contact insulation 1000 Veff
16..
Breaking capacity 250 VAC .Appendices
16.2 Power supply
Auxiliary power supply +/-20%
Maximum ripple 5%
Rated power 4.2
D y
N ▼---------------W
Unit configuration Present None
Model L2234 Apparatus Scale
L2778
Doc..5 PR021/K signalling unit menu
The unit's functions are accessible from the operator panel (PR123/P and PR122/P where applicable)
M 4/4
Enter PWD
L Bus 1/8
Enter J
R n. 2
Page No.1 1/4
C A
S le
1 1
R n..1.3 and 16.. These
contacts enable various applications, including load control, alarms, signals, electric cutouts..5 this manual.4 W
16.N°.
The unit also contains ten LEDs display the following information:
- Power ON: auxiliary power supply on
- Tx(int Bus): flashing synchronized with dialogue with the Internal Bus
- Eight LEDs associated with the signaling contacts.1
R n. 15.1.1. 5
