Power supply systems in accordance with North American standards differ significantly from those in accordance with IEC standards. Apart from the supply system configurations and voltages, the technical and normative requirements also differ. Surge protective devices in accordance with IEC do not comply with these requirements. For this reason, specific SPDs are available for North American supply systems. These comply with the North American standards in accordance with UL and CSA.
Combination lightning current arrester and TVSS system for ungrounded 480 V Delta systems
The VAL-MS-AR 75 VF is a hybrid SPD with a gas discharge tube in series with a metal oxide varistor and thermal monitor, ideal for applications where no leakage current can be tolerated.
The VAL-MS BE-AR base provides a disconnect that separates the field wire from the protected mode for field diagnosis. Independent input and output terminals are on the same side with ground terminals on the opposite end. All terminals are high-current screw clamping for stripped or ferruled, solid or stranded wires.
Equalizer surge protective device assembly, 3-mode, type 2 arresters for 2-wire signals up to 75 V with field disconnect terminals and form-C field monitor contact. Pass through layout separates field and house wires
Indoor/outdoor lightning current arrester and TVSS system for 277/480 V Wye system
Indoor/outdoor lightning current arrester and TVSS system for 120/240 single/split phase
Combination lightning current arrester and TVSS system for ungrounded 480 V Delta systems
Assembly with base element for type 2 arresters of the VALVETRAB MS product range and TE-AR disconnect terminal block, with remote indication contact and field wire isolation. Version for 1-mode protection of field signals in railroad applications.
Indoor/outdoor lightning current arrester and TVSS system for 120/240 single/split phase
Indoor/outdoor lightning current arrester and TVSS system for 240 V High-Leg Delta
Combination lightning current arrester and TVSS system for ungrounded 480 V Delta systems
Surge protection for North American supply systems – VAL-US
VAL-US products are pluggable surge protective devices for installations and systems in North America and Mexico. Additionally, these items are used in regions that require supply system configurations in accordance with the NEMA standard.
The VAL-US series includes a wide range of circuit configurations. Suitable product versions are available for common systems such as 120/240 V split phase and 277/480 V Wye as well as for special supply system configurations such as 120/208/240 V high-leg Delta and corner-grounded Delta. The base element holds the plugs for the individual paths. The status of the plugs can be monitored remotely via the integrated remote indication contact. The plugs feature a window with a visual status indicator. This means overloaded plugs can de identified directly on site. The base element and the corresponding plugs are coded to each other. This prevents incorrect replacement or plug tampering during maintenance work.
The products in the VAL-US family are UL Listed, making them ideal for use in the American market.
Surge protection for North American supply system configurations with CE marking
VAL-US features the largest selection of UL “Open Type” Listed surge protective devices (SPDs). “Open Type,” also referred to as “open terminal,” refers to a category of surge protective devices in UL 1449. This category enables DIN rail-mountable SPDs to obtain UL Listed approval.
The UL Open Type 1 Listed approvals of the VAL-US series make acceptance testing of installations and systems much easier for inspectors.
With CE conformity, the products are available throughout Europe and can be used and installed accordingly.
