
Problems may arise at the start and at low rpm values
if the motor sizes are widely different. This is because
the relatively high ohmic resistance in small motors
calls for a higher voltage at the start and at low rpm
values.
In systems with motors connected in parallel, the elec-
tronic thermal relay (ETR) of the adjustable frequency
drive cannot be used as motor protection for the indi-
vidual motor. Consequently, additional motor protec-
tion is required, such as thermistors in each motor (or
individual thermal relays) suitable for adjustable fre-
quency drive use.
Please note that the individual motor cable for each
motor must be summed and is not to exceed the total
motor cable length permitted.
Electrical installation - brake cable
(Only standard with brake and extended with brake.
Typecode: SB, EB, DE, PB).
No.
Function
81, 82
Brake resistor terminals
The connection cable to the brake resistor must be
screened. Connect the screen by means of cable
clamps to the conductive back plate at the frequency
converter and to the metal cabinet of the brake resis-
tor.
Size the brake cable cross-section to match the brake
torque. See also Brake instructions, MI.90.FX.YY and
MI.50.SX.YY for further information regarding safe in-
stallation.
NOTE
Please note that voltages up to 1099 V
DC, depending on the supply voltage,
may occur on the terminals.
Electrical installation - relay outputs
Torque: 0.5 - 0.6 Nm
Screw size: M3
No.
Function
1-3
Relay output, 1+3 break, 1+2 make
See parameter 323 of the Operating
Instructions. See also
General techni-
cal data.
4, 5
Relay output, 4+5 make See parame-
ter 326 of the Operating Instructions.
See also
General technical data.
Electrical installation - 24 Volt external DC supply
(Only extended versions. Typecode: PS, PB, PD, PF,
DE, DX, EB, EX).
Torque: 4.4-5.3 In-lbs
Screw size: M3
No.
Function
35, 36
24 V external DC supply
External 24 V DC supply can be used as low-voltage
supply to the control card and any option cards instal-
led. This enables full operation of the LCP (incl. pa-
rameter setting) without connection to mains. Please
note that a warning of low voltage will be given when
24 V DC has been connected; however, there will be
no tripping. If 24 V external DC supply is connected or
switched on at the same time as the mains supply, a
time of min. 200 msec. must be set in parameter 120
Start delay.
A pre-fuse of min. 6 Amp, slow-blow, can be fitted to
protect the external 24 V DC supply. The power con-
sumption is 15-50 W, depending on the load on the
control card.
NOTE
Use 24 V DC supply of type PELV to en-
sure correct galvanic isolation (type
PELV) on the control terminals of the ad-
justable frequency drive.
Electrical installation - load sharing
(Only extended with type code EB, EX, DE, DX).
No.
Function
88, 89
Load sharing
VLT
®
5000 Series
MG.51.C5.22 - VLT
p
is a registered Danfoss trademark.
63
Installation
Содержание VLT 5000 Series
Страница 2: ...VLT 5000 Instruction Manual ...
Страница 3: ......
Страница 45: ...Mechanical dimensions cont VLT 5000 Series 42 MG 51 C5 22 VLT p is a registered Danfoss trademark ...
Страница 185: ...VLT 5000 Series 182 MG 51 C5 22 VLT p is a registered Danfoss trademark ...
Страница 186: ...VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 183 EC EMC ...
Страница 196: ...RELATIVE VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 193 List of functions ...
Страница 197: ...EXTERNAL PRESET VLT 5000 Series 194 MG 51 C5 22 VLT p is a registered Danfoss trademark ...
Страница 198: ...References VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 195 List of functions ...
Страница 202: ...VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 199 List of functions ...
Страница 217: ...VLT 5000 Series 214 MG 51 C5 22 VLT p is a registered Danfoss trademark ...
Страница 238: ...Rev 2006 12 12 www danfoss com drives 175R5271 MG51C522 MG51C522 MG51C522 VLT 5000 Instruction Manual ...
Страница 239: ......