Original Stamford AVR Mx321 Made in UK

Model NO.: MX321 Usage: Common Units Cooling
Method: Water Cooling Generator
Type: Diesel Generator Specification: original Conditions
of Use: Land Use Output Type: AC Three Phase Installation
Method: Fixed Trademark: STAMFORD Origin: UK

Original Stamford AVR MX321 made in UK


TECHNICAL SPECIFICATION:

SENSING INPUT
Voltage 170-250 V ac max
Frequency 50-60 Hz nominal
Phase 1 or 3
Wire 2 or 3

POWER INPUT (PMG)
Voltage 170-220 V ac
Current 3 A/phase
Frequency 100-120 Hz nominal
Phase 3 Wire 3

OUTPUT
Voltage max 120 V dc
Current continuous 3.7 A (See note 3)
Transient 6 A for 10 seconds
Field Resistance 15 W minimum
REGULATION (See Note 1) +/- 0.5% RMS*
THERMAL DRIFT
(after 10 min)
0.5% for 40°C change in AVR ambient
SOFT START RAMP TIME
0.4 - 4 seconds
TYPICAL SYSTEM RESPONSE
Field current to 90% 80ms
Machine Volts to 97% 300ms
EXTERNAL VOLTAGE ADJUSTMENT
+/- 6% with 4.7 K W trimmer
UNDER FREQUENCY PROTECTION
Set Point (see note 2) 95% Hz
Slope 100-300% down to 30 Hz
Dwell (Recovery) 0.5-2.0 seconds
UNIT POWER DISSIPATION
18 watts maximum
ACCESSORY INPUT
+/- 1 V = +/- 5% change in output volts
QUADRATURE DROOP
Maximum sensitivity (10 W Burden)
0.22 A for 5% droop @ 0p.f.
CURRENT LIMIT
sensitivity range (10 W Burden) 0.45 A - 1 A
OVER VOLTAGE PROTECTION
Set Point 300 V
Time Delay (fixed) 8-15 seconds
Circuit breaker trip coil voltage 40-60 v dc
Circuit breaker trip coil resistance 50-100 ohms
OVER EXCITATION PROTECTION
Set Point 75 V dc
Time Delay (fixed) 8-15 seconds
ENVIRONMENTAL
Vibration 20 - 100 Hz 50mmc
100 - 2 kHz 3.3g
Relative Humidity 0 - 60°C 95%
Operating Temperature -40 to
+70°C
Storage Temperature -55 to +80°C

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