BASLER MVC-300 User Manual
9121000993
H
Instructions
Oct 2021
2021
For terms of service relating to this product and software, see the Commercial Terms of Products and Services document available at www.basler.com/terms.
www.basler.com
Model
MVC-300
Part Number
+1 618.654.2341 (USA)
info@basler.com
9121000108
PURPOSE
The MVC-300 Manual Voltage Control is used as a backup control device to provide manual voltage control in
case of a voltage regulator failure. The MVC-300 can be mounted on a control panel in ground vehicles,
stationary equipment, or shipboard locations.
DESCRIPTION
The solid-state MVC-300 is enclosed in a metal chassis and designed for “through-the-hole” mounting. MVC-300
controls are located on the front panel and include a Manual Voltage Adjust potentiometer and an Auto-OffManual control switch. MVC-300 connections are made at a terminal strip located on the rear panel. Figure 1
illustrates the front and rear panels of the MVC-300.
SPECIFICATIONS
Input Power: 120 Vac or 240 Vac, single-phase
Output Adjustment Range
120 Vac Input: 1 to 32 Vdc or 1 to 63 Vdc
240 Vac Input: 1 to 63 Vdc or 1 to 125 Vdc
Power Dissipation: 30 W maximum
Minimum Residual Voltage
for Buildup: 6 Vac
Temperature
Operating: –40 to 158°F (–40 to 70°C)
Storage: –85 to 212°F (–65 to 100°C)
Weight:
Net: 3.0 lb. (1.36 kg)
Shipping: 5.0 lb. (2.25 kg)
Shock: Withstands up to 15 g in each of three mutually perpendicular axes.
Vibration: Withstands 5 to 27 Hz at 1.3 g, 27 to 52 Hz at 0.036 in. double amplitude, and 52
to 500 Hz at 5 g.
EC Directive: RoHS 2 2011/65/EU
FUNCTIONAL DESCRIPTION
The MVC-300 controls voltage through a phase-controlled SCR rectifier bridge. Adjusting the front-panel Manual
Voltage Adjust control alters the SCR firing angle and adjusts the level of voltage supplied to the exciter field.
During startup, the internal buildup circuit holds the SCR power bridge at maximum output. Once the voltage
builds to approximately 30 Vac, the buildup circuit relinquishes control to the external Manual Voltage Adjust
control.
The front-panel Auto-Off-Manual control mode switch provides the ability to transfer from voltage regulator control
to the MVC-300 and vice versa. An internal freewheeling diode connected to the field allows safe switching
without the risk of arcing.
The MVC-300 operates from a nominal 120 Vac or 240 Vac source without the need for any electrical wiring
changes such as tap selection or terminal connections. Taps are provided to select a 32 Vac, 63 Vac, or 125 Vac
maximum output.
Publication
Revision
Date
Copyright
Publication
9121000993
Revision
H
Instructions
Date
Oct 2021
Page
2 of 8
MOUNTING
The MVC-300 is designed for “through-the-panel” mounting. It can be installed in any position but vertical
mounting is preferred to improve ventilation/cooling.
Overall mounting dimensions are shown in Figure 2. The front panel of the MVC-300 can be removed and
relocated. Figure 3 illustrates the panel drilling dimensions for relocating the front panel. All dimensions are
expressed in inches with millimeters in parenthesis. Maximum mounting panel thickness is 0.31 inches (8 mm).
Figure 1. MVC-300 Front and Rear Panels
Publication
9121000993
Revision
H
Instructions
Date
Oct 2021
Page
3 of 8
Figure 2. MVC-300 Mounting Dimensions
Loading...