Eliminates false STP run due to voltage leakage of multiple dispensers connected in parallel. Fuse-protected output to submersible pump controller. The STP-DHI/STP-DHIB can retrofit to any existing site.

The STP-DHI device prevents electrical feedback between dispenser hook circuits during periods of maintenance and service as required by NEC 514-6, 1999 and other international codes. DHI models are compatible with submersible pump controllers …

Optically isolates inputs from up to eight dispensers preventing damage to dispenser relay boards caused by cross-phasing. Prevents electrical feedback between dispenser hook circuits during periods of maintenance and service as required by NEC …

another. The STP-DHI assists in preventing: electrical feedback from dispenser hook circuits during servicing, the damage caused by cross-phasing of dispenser hook circuits, and some of the negative effects caused by dispenser voltage leakage on the hook signal circuit. The advantages of the STP-DHI are;

Eliminates false STP run due to voltage leakage of multiple dispensers connected in parallel. Fuse-protected output to submersible pump controller. The STP-DHI can retrofit to any existing site. Specifications. Enclosure size: 8 x 5 x 3 (215 mm x 127 mm x 76 mm). Eight optically isolated inputs from dispenser.

One STP-DHI required per product grade for up to eight dispensers. Key Features. Optically isolates inputs from up to eight dispensers preventing damage to dispenser relay boards caused by cross-phasing.

Install STP/IST per STP\IST Fixed and Variable Length Installation and Owner’s Manual using the appropriate control box. 2. Remove cover of the STP-DHI(B) and mount base indoors to wall or other surface. 3. Connect input power of 120 VAC (supply & neutral) for STP-DHI or 240 VAC (supply & return) for STP-DHIB to the input terminals. 4.

View and Download FE PETRO STP-DHI installation and owner's manual online. DISPENSER HOOK ISOLATION. STP-DHI industrial electrical pdf manual download. Also for: Stp-dhib.

The FE Petro dispenser hook isolation device prevents electrical feedback between dispenser hook circuits as required by most electrical codes.

STP-SCI Controller size: 8½" × 5" × 3" (215 mm × 127 mm × 76 mm). Relay amperage rating: 30 Amps. Relay/hook signal voltage: 120/240 Volt. Compatible with all FE Petro single-phase submersibles and competitive makes. STP-DHI Optically isolates inputs from up to eight dispensers preventing damage to dispenser relay