L2234
L2778
Emax
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Doc. No.
Model
Apparatus
Scale
Page No.
1SDH000460R0002
11. Protection releases - General notes
Emax, the range of ABB air circuit-breakers, now has a new range of electronic relays.
These are called PR121, PR122 and PR123, and they substitute the previous range PR111, PR112 and PR113.
The new protection releases integrate all the functions of their predecessors, adding new and interesting technical features that are useful for
satisfying every current and future system installation need.
Every operational requirement is now met thanks to the different performance levels of the new relays and of the additional modules that can
be fitted inside them (PR120/V, PR120/K, PR120/D-M, PR120/D-BT).
A table can best illustrate the technical features and the mix and matchability of the three relays.
Key:
S
: standard function/unit,
O
: optional function/unit,
-
: function/unit unavailable.
Notes:
1.
: with separate BT030 unit (for temporary connections),
2.
: with internal PR120/D-BT module,
3.
: with PR120/D-M module,
4.
: with PR120/V module.
The main features and improvements of the new relay PR12x with respect to the earlier PR11x are (depending on the combination of relay-
modules):
1. High current reading accuracy (1.5%) and numerous other functions.
2. The PR120/V module for measuring line voltages up to 690 V, is integrated in the relay, making a separate voltage transformer unnecessary.
3. Input can be combined with actions selectable by the user (with PR120/K).
4. Four power outputs fully-configurable by the customer in terms of status, delay and type (with PR120/K).
5. Wireless Bluetooth connection to PDA and/or PC (with PR120/D-BT or BT030).
6. Freely available software for relay testing and maintenance.
7. High-performance data logger with 8 analogue signals and 64 digital signals, which can be synchronized with hundreds of events/situations
of the user’s choice.
8. Relay powered even with the circuit-breaker open, using the busbar voltages (with PR120/V).
9. New residual-current function (Rc).
10. Double protection G function, with simultaneous reading from two sensors (PR123 Restricted Earth fault).
11. Continuous control of the connection of the current sensors and trip coil (all relays).
12. Analysis up to the 40
th
harmonic.
13. Cause of trip is memorized even in self-powered mode (all relays).
14. PR121 with serial link for separate PR021/K and HMI030 module.
15. Extended neutral selection.
16. Double protection S (PR123).
17. Date and time in “real time” (all relays).
Function/Unit
PR121
PR122
PR123
Current protections
(L, S, I, G)
S
S
S
Additional protections
(U, OT)
-
S
S
Voltage protections
(UV, OV, RV, RP, UF, OF)
-
S
(4)
S
Other protections
(D, S2, Double protection G)
-
-
S
Harmonics analysis
-
-
S
Temperature protection
-
S
S
MCR protection
-
S
S
Thermal memory
S
S
S
Local bus for separate auxiliary units
S
S
S
Wire communication
(RS485)
-
S
(3)
S
(3)
Radio communication
(wireless Bluetooth)
S
(1)
S
(1,2)
S
(1,2)
Data Logger
-
S
S
Compatibility with SD.Pocket
S
S
S
Compatibility with SD.Testbus
S
S
S
Compatibility with PR010/T
S
S
S
Dual setting
-
-
S
PR120/V Measuring
(internal voltages module)
-
O
S
PR120/K Signalling
(internal signalling module)
-
O
O
PR120/D-M Com
(internal communication module)
-
O
O
PR120/D-BT WL-Com
(internal Bluetooth communication module)
-
O
O
Residual current protection
-
O
O
PR021/K
(separate signalling unit)
O
O
O
HMI030
(separate graphics interface)
O
O
O
PR030/B
(separate power supply unit)
O
S
S
BT030
(separate Bluetooth communication unit)
O
O
O
