Control card performance
Scan interval
1 ms
Control characteristics
Resolution of output frequency at 0–590 Hz
±
0.003 Hz
Repeat accuracy of precise start/stop (terminals 18, 19)
≤±
0.1 ms
System response time (terminals 18, 19, 27, 29, 32, 33)
≤
2 ms
Speed control range (open-loop)
1:100 of synchronous speed
Speed control range (closed-loop)
1:1000 of synchronous speed
Speed accuracy (open-loop)
30–4000 RPM: Error
±
8 RPM
Speed accuracy (closed-loop), depending on resolution of feedback device
0–6000 RPM: Error
±
0.15 RPM
Torque control accuracy (speed feedback)
maximum error
±
5% of rated torque
All control characteristics are based on a 4-pole asynchronous motor
8.7 Fuses and Circuit Breakers
Use recommended fuses and/or circuit breakers on the supply side as protection in case of component breakdown inside
the adjustable frequency drive (first fault).
NOTICE!
Use of fuses on the supply side is mandatory for IEC 60364 (CE) and NEC 2009 (UL) compliant installations.
Recommendations:
•
gG type fuses.
•
Moeller type circuit breakers. For other circuit breaker types, ensure that the energy into the adjustable frequency
drive is equal to or lower than the energy provided by Moeller types.
Use of recommended fuses and circuit breakers ensures that possible damage to the adjustable frequency drive is limited to
damages inside the unit. For further information, see
Application Note Fuses and Circuit Breakers
..
The fuses below are suitable for use on a circuit capable of delivering 100000 A
rms
(symmetrical), depending on the
adjustable frequency drive voltage rating. With the proper fusing, the adjustable frequency drive Short Circuit Current
Rating (SCCR) is 100000 A
rms
.
Specifications
Instruction Manual
MG33AP22
Danfoss A/S © Rev. 09/2014 All rights reserved.
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