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Types Tri-Phase and Tri-Phase with Ground Trip (TPG) Controls
The Kyle® Types Tri-Phase and Tri-Phase with Ground Trip (TPG) electronic controls are comprised of solid-state circuit boards and plug-in type time current curve (TCC) cards. Controls include DIP switches on the control circuit board and provide means to program control operation.
- Tri-Phase Control settings include unique minimum trip levels for each phase, activation and programming of the instantaneous trip feature, and selection between single- and three-phase tripping.
- TPG control settings include unique minimum trip levels for each phase and minimum trip levels for ground, a ground trip block ON/OFF switch, activation and programming of the instantaneous trip feature for both phase and ground, and selection between independent or three-phase ganged tripping.
In VFI applications with three single-phase trip handles, the control can be switched for single-phase operation. This mode allows independent interruption of the faulted phase(s). When switched for three-phase operation, a fault detected on any phase causes the simultaneous interruption of all three phases.
Both controls use internally mounted 1000:1 ratio current sensing transformers to monitor line current, and are powered by system current via the CTs. The controls require no external voltage supply or battery backup and are not affected by system voltage conditions
Coordination and application of the controls are identical to expulsion fuse application, but with the benefit of greatly expanded trip rating and timing curve selections.
TPG controls use the same internally mounted 1000:1 ratio current-sensing transformers on each phase to monitor line current used for phase tripping. Additional CTs are not required.
Minimum-trip settings for each phase are DIP switch selectable, allowing convenient configuration to meet specific application requirements.
The time-current curve (TCC) delay circuit is a modular, plug-in, printed circuit card, which is available as a separate part for field configuration of the control. A variety of field replaceable TCC modules are available. Each module provides a fixed time current curve characteristic. The range of curves available enables coordination between the Tri-Phase or TPG control and other protective equipment.
Tri-Phase controls require one TCC card for phase sensing. Available TCC cards for Tri-Phase controls include the EF, TF, KF, H, and F curves.
TPG controls require two TCC cards, one for phase sensing and one for phase imbalance (ground sensing).
Instantaneous trip-phase is a standard feature of both the Tri-Phase and TPG controls. Both bypass the normal time-delay characteristics to provide instantaneous tripping in response to high magnitude faults. With instantaneous trip, fault duration is reduced and coordination with source-side protection is extended through improved system coordination and selective zoning.
TPG controls provide an additional DIP switch for instantaneous trip-ground.
The instantaneous trip circuit monitors voltage output from the minimum trip circuits. The voltage is scaled based upon the minimum trip multiplier selected and compared to a fixed reference voltage. The available minimum trip multipliers are 1X, 3X, 5X, 7X, 9X, 11X, 13X, or 15X.
For line currents above minimum trip, but below the selected instantaneous trip multiplier, the installed TCC circuit determines control response.
For line currents at or above the selected instantaneous trip multiplier, control response is fixed at 25 ms.
When extremely inverse TCCs are used, the 25 ms fixed time delay will be ignored at high current levels. In these instances, the installed TCC will operate the trip circuit before the instantaneous trip feature has any effect.
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CI
PST
VACPac
VFI
CI
MOST
PWE, PWVE
RVAC
Shrubline VFI
VACPac
VFI
MOST
RVAC
VACPac
Type Tri-Phase and Tri-Phase with Ground Trip (TPG)
Type S
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