Midea LSBLG255/MZ, Technical & Service Manual, Page: 64 / 113

MCAC-CTSM-2014-03 DX type water-cooled screw chiller (PCB Control)
63
Ⅳ
.Electrical control
1.Electrical data
LSBLGXXX/MZ 255 320 400 485 630 860 970 1060 1260 1490
Standard voltage V 380V 3Ph 50Hz
Voltage range V 340~420
Max. running current A 120 148 189 205 277 383 445 458 554 662
Max. power
consumption
kW 80.6 95.5
127.
5
148.
1
188.
2
255.
5
296.
2
329.
6
376.
4
443.
7
Rated current A 92 119 146 171 213 295 341 365 427 509
Compressor A
Locked rotor Amps. A 690 780 875 1220 1510 2355 1220 1220 1510 1510
Max. allowed current A
145.
2
171.
9
229.
6
266.
7
338.
9
460
266.
7
305.
1
338.
9
338.
9
Rated current A 92 119 146 171 213 295 171 194 213 213
Rated power kW 53.6 67 85 100 125 173 100 114 125 125
Compressor B
Locked rotor Amps. A -- -- -- -- -- -- 1220 1330 1510 2355
Max. allowed current A -- -- -- -- -- --
266.
7
266.
7
338.
9
460
Rated current A -- -- -- -- -- -- 171 171 213 295
Rated power kW -- -- -- -- -- -- 100 100 125 173
Crankcase heater
Voltage V 380 380 380 380 380 380 380 380 380 380
Total input kW 0.3 0.3 0.3 0.3 0.3 0.3 0.6 0.6 0.6 0.6
Total Amps. A 1.36 1.36 1.36 1.36 1.36 1.36 2.72 2.72 2.72 2.72
NOTE:
1). Customer to specify the exact nominal power supply available at site so that electrical components are
selected accurately.
2).Main power must be supplied from a single field supplied and mounted fused circuit breaker.
3).The compressor crankcase heaters must be energized for hours before the unit is initially started or after a
prolonged power disconnection.
4).All field wining must be in accordance with local standards.
5).Neutral line required on 380V-3Ph-50Hz(5 wires) power supply.
6).Rated load Amps values are on nominal conditions.
7).The ±10% voltage variation from the nominal is allowed for a short time not permanent.
2. Electrical components introduction
1) Power protector
This module is used to detect power supply and provide protection in case of phase loss, phase
sequence, and under voltage of incoming line power, so as to prevent damage to the compressor or
other components caused by power failure. Some models also provide protection for overvoltage and
three phase imbalance.