DESCRIPTION AND FEATURES
The SELECT-Cycle converter is intended to power three-phase, high-cycle vibrators using a standard, single-phase, 50/60 Hz,
230V power source.
Internally, the converter uses a Variable Frequency Drive (VFD). The VFD converts this single-phase power to the required
three-phase 133/200 Hz power required by high-cycle vibrators.
The VFD does this by using the single-phase power to charge a DC bus. It then switches the power on and off very rapidly to
simulate the sinusoidal voltage required by high-cycle vibrators.
Three models are available:
• Model #SC1420 has a plug suitable for a four-prong, turn-locking, 20 A, Nema L1420R receptacle.
• Model #SC1430 has a plug suitable for a four-prong, turn-locking, 20 A, Nema L1430R receptacle.
• Model #SC620 has a plug suitable for a three-prong, turn-locking, 20 A, Nema L620R receptacle.
These converters are identical except for the input power plug used. A minimum of a 15 A supply is required.
The wiring for the input plugs is as follows:
Wire Color Plug Terminal Purpose
White X –115V AC
Black Y +115V AC
Green G Ground
Not Used W Not Used
The frequency of the supplied voltage determines the speed of high-cycle vibrators. This converter outputs three frequencies:
133, 180 and 200 Hz. These frequencies correspond to vibration speeds of 8000, 10,800 and 12,000 vpm. Select this speed
with the SELECT-Cycle rotary switch, which can also be switched to the OFF position.
The vibrators plug into two Hubbell (#HBL7410BG) or Leviton (#7420CR), 20 A, 4-pole receptacle outlets. Two plugs that fit
these receptacles are Pass & Seymour Model #7411SS and Hubbell #7411GBC.
OPERATION
Startup
1. Make sure that the equipment is in good safe working order.
2. Check all cables, plugs and electrical outlets to verify they are not damaged.
3. Make sure that the converter rotary switch is in the OFF position.
4. Make sure that the vibrators are turned OFF.
5. Apply power to the converter.
6. Set the converter to the desired speed.
7. Turn the vibrators ON and OFF as desired.
Shutdown
1. Turn OFF the vibrators.
2. Turn the rotary switch on the converter to the OFF position.
3. Unplug the converter or turn OFF the power to the converter.
Description and Features
Page 5December 2018 VBR-UM-02429-EN-03
