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Transformer/Feeder Protection Relays

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Transformer/Feeder Protection.pdf (149kb)
Selection Table 2 pages
MR-I

TYPE: LV & MV Three Phase Overcurrent
Transformer Feeder Protection Relay

KEY FEATURES: Three pole Overcurrent + High Set. Eight IEC & IEEE Protection Curves. Eight Segment LED with Breaker fail Protection & Time Stamping to 10 ms. Two setting option switched by digital input.

ANSI Nos. 50, 50BF, 51

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MRI-I

TYPE: LV & MV Overcurrent
Transformer Feeder Protection Relay

KEY FEATURES: Three pole Overcurrent + High Set. Four Segment LED with Breaker fail. Protection & Time Stamping to 10 ms.

ANSI Nos. 50, 51

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MR-IE

Click image to enlarge
Click to enlargeTYPE: LV & MV Overcurrent & Earth Fault Transformer Feeder Protection Relay

KEY FEATURES: Three pole Overcurrent + High Sets & Earth Fault + High Set - Three levels. Eight IEC & IEEE Protection Curves. Eight Segment LED with Breaker fail Protection & Time Stamping to 10 ms.

ANSI Nos. 50, 50BF, 51, 50n, 51n

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

>> read more PDF
MRI-IE

TYPE: LV & MV Overcurrent & Earth Fault Transformer Feeder Protection Relay

KEY FEATURES: Three pole Overcurrent + High Sets & Earth Fault + High Set. Four Segment LED with Breaker fail. Protection & Time Stamping to 10 ms.

ANSI Nos. 50, 51, 50n, 51n

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MRI-E

TYPE: LV & MV Earth Fault Relay

KEY FEATURES: Earth Fault + High Set. Four Segment LED with Breaker fail. Protection & Time Stamping to 10 ms.

ANSI Nos. 50n, 51n

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MRI-ED

TYPE: LV & MV Directional Earth Fault Relay

KEY FEATURES: Low set functions - Definite time, Normal Inverse, Very Inverse & Extremely Inverse time. High Set Instantaneous or Definite time.

ANSI Nos. 67n

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MRI-EX

Click image to enlarge
Click to enlargeTYPE: LV & MV Sensitive Directional Earth Fault Relay

KEY FEATURES: Single Phase Relay with High set and Low set functions.

ANSI Nos. 67n

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MRI-ID

TYPE: LV & MV Three Phase Directional Overcurrent Relay

KEY FEATURES: Low set functions - Definite time, Normal Inverse,
Very Inverse & Extremely Inverse time. High Set Instantaneous or Definite time.

ANSI Nos. 50, 51, 67

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

>> read more PDF
MRI-IDS

TYPE: LV & MV Three Phase Sensitive Directional Overcurrent Relay

KEY FEATURES: Two stage Low set functions - Definite time, Normal Inverse, Very Inverse & Extremely Inverse time. High Set Instantaneous or Definite time.

ANSI Nos. 50, 51, 67

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MRI-IED

TYPE: LV & MV Three Phase fully Directional Overcurrent & Earth Fault Relay

KEY FEATURES: All functions separately settable and with 10 ms Time Stamping

ANSI Nos. 50, 51, 67, 50n, 51n, 67n

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MRI-REF

TYPE: LV & MV Restricted Earth Fault Relay

KEY FEATURES: High Impedance Differential Current
Unit Protection scheme with instantaneous tripping.

ANSI Nos. 64R

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MRDT

TYPE: Biased Transformer Differential Relay

KEY FEATURES: Two or three winding. Transformers.
Digital Relay with LCD Display. Two stage Biased Differential Protection.

ANSI Nos. 87T

CASE: 19 Inch Rack format

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MIRD-T2

TYPE: Biased Transformer Differential Relay

KEY FEATURES: Two winding Transformers with two stage. Biased Differential Protection via switched settings.

ANSI Nos. 87

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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MRAR

TYPE: Breaker Auto Reclose Relay

KEY FEATURES: Up to four shot Auto Reclose Relay with adjustable Fault, Dead, Close & Reclaim times. Maintenance Alarm & Trip feature.

ANSI Nos. 79

CASE: Draw out case size 100 ( 212 deep ). Panel cut out 99 width x 159 height.

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