GILBARCO VEEDER-ROOT Encore 300 Series, Руководство по установке

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Reference Information
Page 70 MDE-3985L Encore® Installation Manual · May 2006
Circuit Breakers
Figure 4-1: Switched Neutral Circuit Breaker
• A dedicated UL/CUL/CSA listed switched neutral breaker is required for each circuit
leading to a pump/dispenser or dispenser and STPs. It must be able to disconnect hot and
neutral conductors simultaneously. Single-pole breakers with handle ties cannot be used.
• Only UL/CUL/CSA listed circuit breaker panels are permitted for use.
• Circuit breakers must be installed away from the pumps/dispensers, readily accessible and
clearly marked.
• A separate circuit breaker is required for each STP (dispenser models) or each pump
motor (self-contained models).
• One circuit breaker is required for each pump/dispenser to allow isolation of pump/
dispenser.
STP (Submerged Turbine Pump) Control Relay Boxes for Dispensers
• Gilbarco requires installation of STP isolation relays in addition to STP control relays.
Combined STP Control Relay/Isolation Relay boxes are recommended.
• Each STP requires a separate control relay for each STP.
• Dispenser relay must not be used to power the STP.
STP Isolation Relays for Electronic Dispensers
STP isolation relays provide electrical isolation between dispensers and prevents damage from
cross phasing. Refer to MDE-2755 STP Control and Dispenser Isolation Relay Box (PA0287)
and FE-321 Gilbarco STP Isolation Relay Box PA0287 120 VAC Field Wiring Diagram.
Note: For 3 phase STP, use isolation relay at the input of the 3 phase STP control box.
• Gilbarco requires installation of STP isolation relays in addition to STP control relays.
Combined STP Control Relay/Isolation Relay boxes are recommended.
• Isolation relays must be installed for each STP control line at each dispenser or dispenser
grouping on a single circuit breaker.
• Neutral wire must be routed to the control relays from the dispenser circuit breaker (see
field wiring diagrams).
Do not use Use