Protection Functions; Notes About Protection Operation - ABB Tmax T7 Operating Instructions Manual

3.6. Protection functions

PR332/P and PR333/P handle numerous independent protection functions.
The current, voltage, frequency and internal temperature signals are processed by the protection release which, depending on
the protection parameter settings, indicates alarms, performs delay processes and sends commands.
The various types of adjustable protections are managed by the protection release in different ways:
- The current protections are processed according to the true root mean square value of the current values read by the current
sensors.
- The voltage protections are processed according to the true root mean square value of the voltage values read by module PR330/V.
- The frequency protections undergo voltage frequency control.
- Moreover:
- The temperature protection is monitored by means of the internal sensor of the protection release.
The Iinst fixed protection is also available and can neither be disabled nor adjusted: its tripping thresholds are established by
ABB personnel only.
The Protections menu also allows the operator to view and edit all the available parameters.
Protections Options available
Protection L Threshold, Time, Curve, Thermal memory
Protection S Enabling, Threshold, Time, Curve, Thermal Memory, Zone selectivity, Startup
Protection S2 Enabling, Threshold, Time, Thermal Memory, Zone selectivity, Startup
Protection D Enabling, Threshold, Time, Trip enabling, Zone selectivity, Startup
Protection I Enabling, Threshold, Startup
Protection MCR Enabling, Threshold, Operating time slot
Protection G Enabling, Threshold, Time, Curve, Trip enabling, Zone selectivity, Startup
Protection Gext Enabling, Threshold, Time, Curve, Trip enabling, Zone selectivity, Startup
Protection Gext(Idn) Enabling, Threshold, Time
Protection U Enabling, Threshold, Time, Curve, Trip enabling
Protection UV Enabling, Threshold, Time, Trip enabling
Protection OV Enabling, Threshold, Time, Trip enabling
Protection RV Enabling, Threshold, Time, Trip enabling
Protection RP Enabling, Threshold, Time, Trip enabling
Protection UF Enabling, Threshold, Time, Trip enabling
Protection OF Enabling, Threshold, Time, Trip enabling
Protection T Enabling
Load protection Enabling and threshold (1), Enabling and threshold (2), Enabling and threshold (Iw)
Double protection set Enabling, Default set, programmed event for set change
Neutral Protection Enabling, Threshold
Protection MM Enabling, Threshold
Key:
S : standard protection
O : optional function
3.6.1.

Notes about Protection Operation

PR332/P and PR333/P are equipped with "backup-protection". If the first command to the trip coil fails to open the circuit-breaker
immediately (TC locked), further trip commands are transmitted until the circuit-breaker opens.
The declared tolerance values of the measurements and protections of the protection release could change if the electrical char-
acteristics of the current and voltage signals fail to comply with the limits specified in chapter 3.3.8.
B0431
Mod.
Notes:
1. : function available with versions LSI, LSIG, LSIRc and LSIG MM
2. : enabling and parameters available with units PR010/T, Ekip T&P, BT030 or communication via PR330/D-M
3. : function available with versions LSIG and LSIG MM
4. : function enableable with versions LSIG, and external SGR sensor.
5. : function enableable with versions LSIG (+ module PR330/V) and LSIRc, and external Rc sensor.
6. : function enableable with versions LSIG, and external Rc sensor.
7. : functions available when module PR330/V is installed
8. : function available with four-pole CB, or three-pole CB in the 3P+N configuration
9. : function available with MM version
B1751
Apparatus
Emax X1-Tmax T7-Tmax T8
1SDH000587R0002
Doc N°
Protection release
PR332/P PR333/P
S S
S S
(1)
-- S
-- S
S S
S S
(2) (2)
S S
(3) (3)
O O
(4) (4)
O O
(5) (6)
S S
O S
(7)
O S
(7)
O S
(7)
O S
(7)
O S
(7)
O S
(7)
S S
S S
-- S
S S
(8) (8)
S --
(9)
Scale
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