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VLT
®
HVAC Drive Instruction Manual
Voltage (V)
4
200 - 240
1.5–5 hp [1.1–3.7 kW] 7.5–60 hp [5.5 –45 kW]
380 - 480
1.5–10 hp [1.1–7.5 kW] 15–125 hp [11–90 kW]
525-600
1.5–10 hp [1.1–7.5 kW] 15–125 hp [11–90 kW]
525-690
Be aware that there may be high voltage on the DC link even when the LEDs are turned off.
2.1.4 Before Commencing Repair Work
1.
Disconnect the adjustable frequency drive from line power.
2.
Disconnect DC bus terminals 88 and 89
3.
Wait at least the time mentioned above in the section General Warning.
4.
Remove motor cable
2.1.5 Special Conditions
Electrical ratings:
The rating indicated on the nameplate of the adjustable frequency drive is based on a typical 3-phase line power supply within the specified voltage,
current and temperature ranges, which are expected to be used in most applications.
The adjustable frequency drives also support other special applications, which affect the electrical ratings of the adjustable frequency drive.
Special conditions that affect the electrical ratings might be:
•
Single phase applications.
•
High temperature applications that require derating of the electrical ratings.
•
Marine applications with more severe environmental conditions.
Other applications might also affect the electrical ratings.
Consult the relevant sections in this manual and in the VLT HVAC Drive
Installation requirements:
The overall electrical safety of the adjustable frequency drive requires special installation considerations regarding:
•
Fuses and circuit breakers for overcurrent and short-circuit protection
•
Selection of power cables (line power, motor, brake, load sharing and relay)
•
Grid configuration (grounded delta transformer leg, IT,TN, etc.)
•
Safety of low-voltage ports (PELV conditions).
Consult the relevant clauses in these instructions and in the VLT HVAC Drive
Min. Waiting Time (Minutes)
15
20
150–350 hp [110–250
kW]
15–125 hp [11–90 kW] 60–550 hp [45–400 kW]
Design Guide, MG.11.BX.YY
Design Guide
MG.11.AB.22 - VLT
®
is a registered Danfoss trademark
30
450–1350 hp [315–
600–1875 hp [450–
1400 kW]
for information about the electrical ratings.
for information about the installation requirements.
2 Safety
40
2
1000 kW]
2-3
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