beautypg.com

Table 39 bypass input, Bypass input – Emerson Liebert NX 50 and 60 Hz User Manual

Page 131

background image

Technical Specifications

119

Table 39

Bypass input

Rated Power, kVA

Unit of

Measurement

30

40

60

80

100

120

140

160

200

Rated AC Voltage

1

V (ac)

380/400/415 V

three-phase four-wire, sharing neutral with the rectifier input and

providing neutral reference to the output

Rated current

380V

A

45

61

91

121

151

182

212

242

303

400V

43

58

87

116

145

174

202

230

288

415V

42

56

83

111

139

167

194

222

278

Overload capacity

%

135% long term

170% 10 min

1000% 100 ms

125% long term

150% 10 min

1000% 100 ms

Upstream protection, bypass
line (by others)

Thermomagnetic circuit-breaker, rated up to 125% of nominal output

current. IEC 60947-2 curve C.

Current rating of neutral cable

A

1.7 In

1.52In

1.35In

Frequency

2

Hz

50 / 60

Transfer time (between
Bypass and Inverter)

ms

Synchronous transfer:

≤ 1ms

Asynchronous transfer (default): 15 ms (50 Hz), 13.3 ms (60 Hz)

or 40, 60, 80, 100 ms selectable

Bypass voltage tolerance

% V (ac)

Upper limit: +10, +15 or +20, default +15

Lower limit –10, -20, -30 or -40, default: -20

(delay time to accept steady bypass voltage: 10 sec)

Bypass frequency tolerance

%

± 2.5, ±5, ±10 or ±20 default ±10

Synchronisation - Window

Hz

Rated frequency ±2 Hz (selectable ± 0.5 to ± 3Hz)

1.

Factory set to 400V – 380 or 415V selectable by commissioning engineer.

2.

Factory set to 50Hz; 60 Hz selectable by commissioning engineer. Bypass condition ignored when UPS set as frequency converter.

This manual is related to the following products: