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Emax X1-Tmax T7-Tmax T8
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Apparatus
Scale
Page No
1SDH000587R0002
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 release
PR332/P
PR333/P
Protection L
Threshold, Time, Curve, Thermal memory
S
S
Protection S
Enabling, Threshold, Time, Curve, Thermal Memory, Zone selectivity, Startup
S
(1)
S
Protection S2
Enabling, Threshold, Time, Thermal Memory, Zone selectivity, Startup
--
S
Protection D
Enabling, Threshold, Time, Trip enabling, Zone selectivity, Startup
--
S
Protection I
Enabling, Threshold, Startup
S
S
Protection MCR
Enabling, Threshold, Operating time slot
S
(2)
S
(2)
Protection G
Enabling, Threshold, Time, Curve, Trip enabling, Zone selectivity, Startup
S
(3)
S
(3)
Protection Gext
Enabling, Threshold, Time, Curve, Trip enabling, Zone selectivity, Startup
O
(4)
O
(4)
Protection Gext(Idn) Enabling, Threshold, Time
O
(5)
O
(6)
Protection U
Enabling, Threshold, Time, Curve, Trip enabling
S
S
Protection UV
Enabling, Threshold, Time, Trip enabling
O
(7)
S
Protection OV
Enabling, Threshold, Time, Trip enabling
O
(7)
S
Protection RV
Enabling, Threshold, Time, Trip enabling
O
(7)
S
Protection RP
Enabling, Threshold, Time, Trip enabling
O
(7)
S
Protection UF
Enabling, Threshold, Time, Trip enabling
O
(7)
S
Protection OF
Enabling, Threshold, Time, Trip enabling
O
(7)
S
Protection T
Enabling
S
S
Load protection
Enabling and threshold (1), Enabling and threshold (2), Enabling and threshold (Iw)
S
S
Double protection set Enabling, Default set, programmed event for set change
--
S
Neutral Protection
Enabling, Threshold
S
(8)
S
(8)
Protection MM
Enabling, Threshold
S
(9)
--
Key:
S :
standard protection
O : optional function
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
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.
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