We incorporate a metal foot on all units to ensure a proper ground. Ventex attaches the grounding foot to the ground on the primary to create a “double ground”; one to the primary and one to the mounting surface.
The GTO clamping system is exclusive to the VT 12030D-120 and VT 12030-120 units. This system allows you to run the exact length of GTO to your sign with no splices while the most common GTO 15 will work in the system. The length of the GTO should not exceed the length of 4 feet…
Yes, you can mount the channel letters unit to a metallic raceway or wire way. You must run the GTO wire through a minimum .75-inch hole and place it in a bushing. In addition, take care to maintain separation between the GTO leads and the metal of the raceway.
No, the metallic conduit causes severe capacitive coupling. Therefore, it reduces the power to the sign or causes the unit to trip.
Ventex power supplies put out a constant 30mA for consistent brightness. If you are experiencing dimming, that means that you are losing power due to excess capacitance coupling. Check your GTO wires and neon tube configuration to make sure they are not touching or running close to a metal surface. Also make sure the GTO…
This means that you have met one of the criteria for the protection circuit to operate. Meeting one of four fault conditions activates the circuit: overload, open, short or ground fault. If the unit flashes, check for these conditions, because it does not reflect a defective power supply.
Capacitive coupling is a result of the magnetic field around the glass and GTO leads. The field robs power from the power supply and neon, and this leaves a dim sign or a tripping problem. Sleeving or other insulation will not reduce this magnetic field, but distance will help.
If it’s a magnetic transformer, it can be midpoint grounded. If it’s an electronic power supply, there is no need for an isolated return like there is on a magnetic transformer.
We work hard to ensure product safety, so our power supplies are compliant with UL 2161, CUL and CE standards.
All units, regardless of voltage, should be UL2161 Listed as of September 2000. Units over 6,000 volts need ground fault protection to be UL2161 Listed.