UCM274H Tech Data Sheet
UCM274H Tech Data Sheet
UCM274H Tech Data Sheet
UCM274H
SPECIFICATIONS & OPTIONS
Marine generators may be certified to Lloyds, DnV, Standard generators are 3-phase reconnectable with
Bureau Veritas, ABS, Germanischer-Lloyd or RINA. 12 ends brought out to the terminals, which are
Other standards and certifications can be considered mounted on a cover at the non-drive end of the
on request. generator. A sheet steel terminal box contains the
AVR and provides ample space for the customers'
VOLTAGE REGULATORS wiring and gland arrangements. It has removable
panels for easy access.
MX341 AVR - STANDARD
SHAFT & KEYS
This sophisticated Automatic Voltage Regulator
(AVR) is incorporated into the Stamford Permanent All generator rotors are dynamically balanced to
Magnet Generator (PMG) control system, and is better than BS6861:Part 1 Grade 2.5 for minimum
standard on marine generators of this type. vibration in operation. Two bearing generators are
The PMG provides power via the AVR to the main balanced with a half key.
exciter, giving a source of constant excitation power
independent of generator output. The main exciter INSULATION/IMPREGNATION
output is then fed to the main rotor, through a full
wave bridge, protected by a surge suppressor. The The insulation system is class 'H'.
AVR has in-built protection against sustained over- All wound components are impregnated with
excitation, caused by internal or external faults. This materials and processes designed specifically to
de-excites the machine after a minimum of 5 provide the high build required for static windings
seconds. and the high mechanical strength required for
An engine relief load acceptance feature can enable rotating components.
full load to be applied to the generator in a single
step. QUALITY ASSURANCE
If three-phase sensing is required with the PMG
system the MX321 AVR must be used. Generators are manufactured using production
We recommend three-phase sensing for applications procedures having a quality assurance level to BS
with greatly unbalanced or highly non-linear loads. EN ISO 9001.
2
UCM274H
WINDING 311
3
UCM274H
50 Winding 311
Hz THREE PHASE EFFICIENCY CURVES
4
UCM274H
Winding 311
60
THREE PHASE EFFICIENCY CURVES
Hz
5
UCM274H
Winding 311
25
PER CENT TRANSIENT VOLTAGE DIP
20
15
10
0
0 100 200 300 400 500 600 700 800
LOCKED ROTOR kVA
60
Hz
380V 416V 440V 460V 480V
30
25
PER CENT TRANSIENT VOLTAGE DIP
20
15
10
0
0 100 200 300 400 500 600 700 800 900 1000
LOCKED ROTOR kVA
6
UCM274H
SYMMETRICAL
ASYMMETRICAL
1000
CURRENT (Amps)
100
10
0.001 0.01 0.1 1 10
TIME (secs)
60 10000
Hz
1000
CURRENT (Amps)
SYMMETRICAL
ASYMMETRICAL
100
10
0.001 0.01 0.1 1 10
TIME (secs)
RATINGS
Class - Temp Rise Cont. E - 65/50°C Cont. B - 70/50°C Cont. F - 90/50°C Cont. H - 110/50°C
Series Star (V) 380 400 415 440 380 400 415 440 380 400 415 440 380 400 415 440
50 Parallel Star (V) 190 200 208 220 190 200 208 220 190 200 208 220 190 200 208 220
Hz Series Delta (V) 220 230 240 254 220 230 240 254 220 230 240 254 220 230 240 254
kVA 142.5 142.5 142.5 n/a 143.8 143.8 143.8 n/a 170.0 170.0 170.0 n/a 175.0 175.0 175.0 n/a
kW 114.0 114.0 114.0 n/a 115.0 115.0 115.0 n/a 136.0 136.0 136.0 n/a 140.0 140.0 140.0 n/a
Efficiency (%) 93.7 93.8 93.9 n/a 93.7 93.8 93.9 n/a 93.4 93.6 93.7 n/a 93.4 93.6 93.7 n/a
kW Input 121.7 121.5 121.4 n/a 122.8 122.6 122.5 n/a 145.6 145.3 145.1 n/a 149.9 149.6 149.4 n/a
60 Series Star (V) 416 440 460 480 416 440 460 480 416 440 460 480 416 440 460 480
Parallel Star (V) 208 220 230 240 208 220 230 240 208 220 230 240 208 220 230 240
Hz
Series Delta (V) 240 254 266 277 240 254 266 277 240 254 266 277 240 254 266 277
kVA 168.8 175.0 181.3 181.3 175.0 187.5 200.0 200.0 200.0 212.5 218.8 218.8 212.5 218.8 221.3 225.0
kW 135.0 140.0 145.0 145.0 140.0 150.0 160.0 160.0 160.0 170.0 175.0 175.0 170.0 175.0 177.0 180.0
Efficiency (%) 93.7 93.9 93.9 94.0 93.7 93.8 93.8 93.9 93.4 93.6 93.7 93.8 93.3 93.5 93.7 93.8
kW Input 144.1 149.1 154.5 154.3 149.4 159.9 170.6 170.4 171.3 181.6 186.8 186.6 182.2 187.2 188.9 191.9
DIMENSIONS