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Publication

903700099X

Revision

First Printing: 11/73

Revised: 01/07

2007

FOR

MANUAL VOLTAGE CONTROL

MVC 104, MVC 108, AND MVC 232

INTRODUCTION

The Manual Voltage Control (MVC 104, MVC 108, or

MVC 232) allows the output voltage of a generator to

be controlled manually or automatically and provides

a means for system voltage shutdown. The Manual

Voltage Control (MVC) is designed for use with Basler

Electric automatic voltage regulators in brushless

exciter applications.

MVC components are housed in a rugged metal case

that may be door- or panel-mounted.

SPECIFICATIONS

MVC electrical and physical specifications are listed in

the following paragraphs.

Input Power (Single-Phase)

Nominal Input Voltage ∗

MVC 104: 120 Vac, 50 to 400 Hz

MVC 108: 240 Vac, 50 to 400 Hz

MVC 232: 60 Vac, 50 to 400 Hz

∗ When the generator voltage does not match the

nominal input values listed, an isolation trans-

former must be used. See Figure 5 for the

isolation transformer connections.

Maximum Burden

MVC 104: 840 VA

MVC 108: 1,680 VA

MVC 232: 1,200 VA

Output Power (Maximum Continuous)

MVC 104: 110 Vdc, 7 Adc

MVC 108: 220 Vdc, 7 Adc

MVC 232: 55 Vdc, 20 Adc

Physical Specifications

Operating Temperature: –40 to 50°C (–40 to 122°F)

Weight

MVC 104: 29 lb (13.2 kg)

MVC 108 and 232: 36 lb (16.3 kg)

Agency Recognition

MVC 104 and MVC 108 certified per CSA Standard

CAN/CSA-C22.2, No. 14.

MVC COMPONENTS

Manual Voltage Control components include a three-

position switch, a variable autotransformer, a full-wave

rectifier bridge, and fuses.

OPERATION

NOTE

The MVC autotransformer must be set at zero

(fully counterclockwise position) before placing the

three-position switch in the Manual position.

When the three-position switch is placed in the

Manual position, the automatic voltage regulator is

removed from the line and the generator voltage is

controlled by the MVC. The variable autotransformer

and rectifier bridge of the MVC supply a user-selected

level of dc power to the exciter field. The dc output of

the MVC is determined by the position of the auto-

transformer, the exciter and generator parameters,

and load conditions.

When the three-position switch is placed in the Auto

position, the generator voltage is controlled by the

automatic voltage regulator.

Complete system shutdown occurs when the three-

position switch is placed in the Off position.

With the three-position switch in either the Off or

Manual position, all automatic voltage regulator

terminals are rendered “maintenance safe” and the

regulator may be removed from the system.

OVERLOAD PROTECTION

Overload protection in Manual and Auto modes is

provided by two fuses. These fuses provide overload

protection for both the MVC and the voltage regulator.

MOUNTING

The MVC legend plate can be removed for front panel

mounting.

Panel drilling dimensions are illustrated in Figure 1.

Outline dimensions for the MVC 104, MVC 108, and

MVC 232 are shown in Figure 2.

CONNECTIONS

Typical MVC connections are illustrated in Figures 3

and 4.

When the generator voltage does not match the

nominal input values listed in Table 1, an isolation

transformer must be used. Figure 5 illustrates the

isolation transformer connections.

Table 2 lists the recommended wire sizes for MVC

connections.

1 2 3 4

MANUAL VOLTAGE CONTROL 1

Sommario

Pagina 1 - MANUAL VOLTAGE CONTROL

Pagina 2

Table 2. Recommended Wire Sizes Terminal Recommended Wire Size L1, L2, L3, E1, E2, E3, 1, and 2 14 AWG F1, F2, F+, F–, 3, 4, 23, and 24 12 AWG Page 2

Pagina 3

Figure 3. Typical Connections, SR Voltage Regulator Figure 4. Typical Connections, KR Voltage Regulator Publication 903700099X Revision B First

Pagina 4

Figure 5. Isolation Transformer Connections Figure 6. Terminal and Fuse Locations Page 4 First Printing: 11/73 Revised: 01/07 Revision B Pub

Modelli collegati MVC108 | MVC232 |

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Basler-electric MVC104 Manuale Utente

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Sommario

Modelli collegati MVC108 | MVC232 |

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