SACE TMAX XT UL/CSA LOW VOLTAGE MOLDED CASE C I RCUI T- BRE AKERS UL4 89 AND CSA C2 2 . 2 STANDARDS
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— Ekip Touch/Hi-Touch Protection functions Distorted waveform: Base + 3rd Harmoni
240 V
0 V
3rd Harmonic (150 Hertz)
-240 V
Base Sine Waveform (50 Hertz) Distorted waveform: Base + 3rd Harmonic
240 V
L Motor protection overload in compliance with Standard IEC 60947-4-1 Table 2 The L function protects the motor against overloads in accordance with the indications and classes defined by Standard IEC 60947-4-1 and the Table 2. The trip time is established by choosing the appropriate trip class, which depends on the motor that must be protected. In addition to this protection, the thermal memory function (implemented in accordance with Standard IEC60255-8 and the above-mentioned Standard) is permanently activated. After tripping the Ekip M Touch LRIU, the thermal memory is active for a time that depends on the trip class selected (see table). The protection unit will trip faster than the time established for a cold fault condition if a new overload occurs before the thermal memory automatically resets (hot trip condition). The protection has a “start-up” stage from the moment the current exceeds 0.25xIn to the moment the minimum time of the selected trip class is reached. Adaptive protection: dual setting of protections (Set A-B) The Ekip Hi-Touch can store a set of alternative parameters (set B) for all protections. This second set can replace the default series (set A) with an external control. A typical application for dual settings may be when an emergency source is activated in the system, causing a change of load capacity and short-circuit levels, and in cases of switchgear maintenance to protect the operator against electric arcs (the minimum trip delays of set B guarantee safety for the operator). It is possible to activate series B by: • Digital input, available with an Ekip Signalling module; • Communication network, by means of one of the Ekip Com communication modules; • Directly from the Ekip Hi-Touch display; • Using a settable internal time, after the circuit-breaker has closed.
0 V
3rd Harmonic (150 Hertz)
-240 V
Set B Base Sine Waveform (50 Hertz)
Set A
Trigger event
Set B
Set A
t
IEC 60947-4-1 Table 2 Distorted waveform: Base + 3rd Harmonic Trigger event
240 V
0 V
t
3rd Harmonic (150 Hertz)
IEC 60947-4-1 Table 2
-240 V
I
Base Sine Waveform (50 Hertz)
t
I
Ij/Is Set B
Set A
t
ti/tj
f
Trigger event
Ij/Is
t
TRIP CLASS
CLASS MIN
CLASS MAX
TMEM RESETTING TIME
ti/tj
IEC 60947-4-1 Table 2
f
5E
3s 5s
5s
5 min
10E 20E 30E
10s 20s 30s
10 min 20 min 33 min
Iu
10s 20s
t
tu
f I
R Protection against rotor blockage This protects the motor in two different ways, depending on whether the fault occurs on startup or during normal operation. The behavior in the two operating conditions is defined by the Standard IEC 947-4-1 in Annex 2. In the first case (Jam), the operation of the R function protects the motor against rotor jamming during normal operation. The R (Jam) protection function works in conjunction with the L protection to en- sure that the motor start-up phase is completed. The R (Jam) protection is inhibited during the start-up phase for the same time as the minimum time in the selected overload protection trip class. Once this time has elapsed, the R protection is activated and causes the circuit-breaker to trip if the current remains above the current threshold setting (I5) for longer than the time (t5) setting of the protection. In the sec- ond case (Stall), the protection is designed to operate to protect the motor against rotor jamming upon start-up. If activated, the R (Stall) protection is not inhibited during start-up and causes the circuit-breaker to open if the current remains above the current threshold setting (I8) for longer than the time setting (t8) of that protection. The protection has a “start-up” stage from the moment the current exceeds 0.25xIn to the moment the minimum time of the selected trip class is reached.
Iu
t t
tu
f
Iuc Ij/Is
tuc ti/tj
t
f f
Iuc
t t
tuc
f
I7 Iu
t7 tu
t
f f
I7
t t
t7
f
PT100 Iuc
t
tuc
f f
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