Emerson Liebert NX User Manual

Technical Specifications
75
Table 35 Inverter output to critical load
Rated Power, kVA (kW)
Unit of
Measurement 10 (8) 15 (12) 20 (16)
Rated AC Voltage
1
VAC
220/230/240V (single-phase, two-wire with neutral
referenced to the bypass neutral)
Frequency
2
Hz 50 / 60
Overload % Rated
110% for 60 min
125% for 10 min
150% for 1 min
>150% for 200 msec
Fault Current % Rated 340% current limitation for 200 msec
Non linear load capability
3
% Rated 100%
Steady state voltage stability % ±1 (balanced load), ±2 (100% unbalanced load),
Transient voltage response
4
%± 5
Total Harmonic Voltage
Distortion (THDV)
% < 1 (linear load), < 5 (non linear load
3
)
Synchronisation - Window Rated frequency ± 2Hz (selectable ± 0.5 to ± 3Hz)
Slew Rate (Max change rate
of synch frequency)
Hz sec
1 Hz/sec
selectable 0.1 to 3Hz/s (single UPS)
0.2Hz/sec (paralleled UPS)
Inverter Voltage Tolerance %V (AC) ±5
1. Factory set to 230V—220 or 240V selectable by commissioning engineer.
2. Factory set to 50Hz; 60 Hz selectable by commissioning engineer. Frequency converter operation also selectable.
3. EN 50091-3 (1.4.58) crest factor 3:1
4. IEC 62040-3 / EN 50091-3 also for 0-100-0% load transient. Transient recovery time: return to within 5% of steady state
output voltage within half a cycle.
Table 36 Bypass mains input
Rated power, kVA
Unit of
Measurement
10 15 20
Rated AC Voltage
1
VAC
220/230/240 V
single-phase, two-wire, sharing neutral with the rectifier input
and providing neutral reference to the output
Rated Current
220V A 45 68 91
230V A 43 65 87
240V A 42 63 83
Overload Capacity %
135% long term
170% 10 min
1000% 100 ms
Upstream Protection,
Bypass Line (by others)
N/A
Thermomagnetic circuit breaker, rated up to 125%
of nominal output current. IEC 60947-2 curve C.
Frequency
2
Hz 50 / 60
Transfer Time (between
bypass and inverter)
ms
Synchronous transfer: ≤0.5ms
Asynchronous transfer (default): 15 ms (50 Hz),
13.3 ms (60 Hz) or 40, 60, 80, 100 ms, selectable
Bypass Voltage Tolerance % VAC
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 ±2Hz (selectable ± 0.5 to ±3Hz)
1. Factory set to 230V – 220 or 240V selectable by commissioning engineer.
2. Factory set to 50Hz; 60 Hz selectable by commissioning engineer. Bypass condition ignored when UPS set as frequency
converter.

Emerson Liebert NX Specifications

General

Brand	Emerson
Model	Liebert NX
Category	UPS
Language	English