Woodward ProTech-GII – Bulkhead Mount Independent Relays 8237-2594

Woodward   ProTech-GII – Bulkhead Mount Independent Relays  8237-2594

The ProTech-GII is an

overspeed safety device

designed to safely shut

down steam, gas, and

hydro turbines of all

sizes upon sensing an

overspeed or over

acceleration event. This

device accurately

monitors turbine rotor

speed and acceleration

via active or passive

magnetic pickups

(MPUs) and issues a

shutdown command to the turbine’s trip valve(s) or corresponding trip system.

Depending on the system design, the ProTech-GII can be purchased with two dual

redundant trip relay outputs using a 2-out-of-3 voted architecture, or with three

independent non-voted trip relay outputs. Individual alarm relays, 4–20 mA speed

readouts, and Modbus® * communications make this overspeed device easy to

integrate into any turbine safety system.

*—Modbus is a trademark of Schneider Automation Inc.

The ProTech-GII is available in flush-mount models designed to be installed within a

standard 24” (610 mm) cabinet front door, or models designed to be bulkhead

mounted on a wall or skid near the turbine set. Designed for harsh environments

when installed within an enclosure, this device has an ingress protection rating of

IP56 (protected against dust and completely protected against jets of water of similar

force to heavy seas).

Designed for high reliability, each ProTech-GII module (A, B, C), depending on the

purchased model, accepts two high-voltage power inputs (90–240 Vac / 100–150

Vdc) or one high-voltage power input (90–240 Vac / 100–150 Vdc) and one low

voltage power input (18–32 Vdc). This design works on a high-signal-select basis,

allowing the unit to fully operate with either or both power sources available.

Applications

The ProTech-GII is designed to safely shut down steam, gas, and hydro turbines

upon sensing a turbine overspeed or over-acceleration event. The device’s 12

millisecond response time and 0.5 to 80 000 rpm speed range make it ideal for

application on all types and sizes of turbines.

The ProTech-GII models with two dual-redundant relay outputs are design to be applied with simplex or dual-redundant trip

block assemblies or trip systems. The ProTech-GII models with three independent non-voted output models are designed

to be applied with special turbine trip block assemblies that perform the 2-out-of-3 voting within their design.

This fast acting overspeed protection device is designed to be applied in conjunction with a turbine control or trip system to

safely shut down the turbine. Interface with related control systems or plant Distributed Control Systems (DCSs)  can be

performed via the ProTech-GII’s redundant hard-wired input and output signals or through its triple-redundant serial

Modbus communications ports. Optionally, Ethernet gateways can be purchased to easily interface with plant Ethernet

networks.

Certified as an IEC61508 SIL-3 (Safety Integrity Level Three) safety device, the ProTech-GII can easily be applied within

an IEC61508 or IEC61511 based safety system. A thorough product manual is provided to instruct users on how to apply

the ProTech-GII to meet IEC based requirements.

Designed for system-critical applications, the ProTech-GII’s triple-modular architecture coupled with its on-line testing and

on-line repair capabilities give it one of the highest availability and reliability ratings in the industry.

ProTech-GII

ProTech-GII – Bulkhead Mount, HV/LV, Independent Relays

8237-2594

ProTech-GII – Bulkhead Mount, HV/HV, Independent Relays

8237-2595

ProTech-GII – Bulkhead Mount, HV/LV, Voted Relays

8237-2596

ProTech-GII – Bulkhead Mount, HV/HV, Voted Relays

8237-2597

ProTech-GII – Panel Mount, HV/LV, Independent Relays

8237-2598

ProTech-GII – Panel Mount, HV/HV, Independent Relays

8237-2599

ProTech-GII – Panel Mount, HV/LV, Voted Relays

8237-2600

ProTech-GII – Panel Mount, HV/HV, Voted Relays

*Documentation: Product Spec: 03370. Manual: 35086

8237-2601