Cat® Digital Voltage Regulator Caterpillar

Electrical

Usage:

SR4B 1BN

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Table 1
Specifications
Regulation		0.25% from no load to full load.
Regulator temperature drift		Less than ±1% for any 40 °C (72 °F) change over the ambient operating temperature range.
Volts/Hz characteristic that can be configured		Two slope ranges adjustable from 1 to 10 V/Hz. Refer to regulation characteristic Illustration 1.
Regulator response time		Maximum of 10 milliseconds.
Regulator sensing		True RMS 3-phase sensing is standard. Single phase sensing is available. Variable sense range: 90 to 600 V.
Regulator stability		The regulator maintains stable output voltage within 0.25% for total harmonic distortion of the generator output voltage waveform up to 30%. The regulator maintains stable output voltage within 0.50% for total harmonic distortion of the generator output voltage waveform up to 40%. Thee values are based on a typical 6-SCR bridge.
Telephone influence factor (TIF)		Less than 50. Complies with MIL STD 461C Part 9 and VDE 0875 level N.
Fine voltage adjust range		± 10% of regulator sensing voltage.
Regulator voltage gain (Line loss compensation)		Adjustable from 0 to 10%.
Fault detection and identification		Diagnostics identify operation outside of programmed limits. Specific fault information is available even after the unit has been powered down. CAN bus only.
Harmonic tolerance		For total harmonic distortion of the generator output voltage waveform up to 30%, the regulator maintains stable output voltage within 0.25%. For total harmonic distortion of the generator output voltage waveform up to 40%, the regulator maintains stable output voltage within 0.50%. These values are based on a typical 6-SCR bridge.
Reactive droop adjustment		Adjustable from 0 to 10%.
Over excitation protection		Shuts off generator output when excitation current exceeds normal operating currents for 10 seconds or instantaneous shutoff if output current exceeds approximately 28 A.
Ambient operating temperature		−40 °C (−40 °F) to +70 °C (+ 158 °F).
Storage temperature range		−40 °C (−40 °F) to +85 °C (+ 185 °F).
Power dissipation		5 W at idle, 55 W at rated output.
Shock		Withstands up to 20 g (g-force ) in three mutually perpendicular planes.
Vibration		Withstands 4.5 g (g-force ) at frequencies between 18 and 2000 Hz in three mutually perpendicular planes.
Salt fog		5% salt spray for 48 hours at 38 °C (100.4 °F) at 115% of the nominal operating voltage.
Weight		1.47 kg (3.24 lb.).
Electromagnetic compatibility		Meets 89/336/EEC Electromagnetic Compatibility Directive.
Power supply		24 ± 6 VDC power supply required (0.5 amp).
Conformity	UL	Underwriters Laboratory (UL) recognized per "Standard 508, UL File No. E97035".
	CSA	Certified per "Standard CAN/CSA-C22.2 No. 14-95, CSA File No. LR 23131".
	CE	Conforms to the following standards: Radiated Emissions EN50081-2 Radiated Immunity (electric field) EN61000-4-3 (10 V/m) Radiated Immunity (conducted) EN61000-4-6 (10 VRMS) Conducted Emissions EN50081-2 (EN55011, Class A) ESD Immunity EN50082-2 (4 kV contact, 8 kV air) EFT Immunity EN50082-2 (2 kV coupling clamp) Magnetic Immunity EN50082-2 (30 ARMS, 50 Hz) Safety EN61010-1

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Illustration 1	g01040043
Regulation characteristic

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Table 2
Summary of Operating Parameters
Parameter	Specifications
Voltage Regulation Rating	120 to 15000 V
Generator Type	PM SE Internal Excitation (IE)
Power Input	Voltage⁽¹⁾	Frequency	Burden (Continuous)
Power Input	80 to 264 V (3Ø) 100 to 280 V (1Ø)	50 to 400 Hz	1150 VA (63 VDC applications) or 1900 VA (125 VDC applications)
Output Rating	Maximum Continuous		Maximum Forcing (10 Seconds)
	Voltage	Current	Voltage	Current
	63 V or 125 V	12 or 10 A	125 V or 250 V	25 or 20 A
Sensing	Voltage		Maximum VA Burden per Ø
Sensing	90 to 600 V		1 VA
Reactive Droop	Maximum Current		Maximum VA Burden
Reactive Droop	5 A		1 VA
Exciter Field Resistance	Minimum Resistance		Maximum Resistance
Exciter Field Resistance	3 Ohms		39 Ohms

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⁽¹⁾	As the CDVR input voltage increases, the PWM duty cycle decreases. As PWM duty cycle decreases, system stability may decrease as well. Powering the CDVR with a voltage closer to the low end of this range is preferred.