Revision History
Prot, Overcurrent
The MCDLV4 now displays the determined direction of the phase currents and of the measured and calculated
ground current) under the menu path [Operation / Measured Values / Direction detection]. It is recommended to
verify the current direction by these values during commissioning.
Undervoltage – V[n]
For the voltage protection running in “undervoltage” mode –
»Mode« = “V<” – an undercurrent criterion is available
as a new feature.
The basic principle of this “minimum current check”, is that it blocks the undervoltage protection as soon as all
phase currents drop below a certain threshold value. The motivation for using this feature is that a situation where
all phase currents are “dead” probably indicates an open circuit breaker, and it is probably not desirable that the
undervoltage protection reacts to this event.
Thermal replica module – ThR
The setting range of the overload factor
»K« has been extended (from 0.80‒1.20) to 0.80‒1.50 (IEC 60255-149).
Loss of Potential – LOP
The (internally fixed) undervoltage threshold has been increased from 0.01 Vn to 0.03 Vn (“FNN 2015” –
Specification published by the
Forum Netztechnik / Netzbetrieb im VDE).
SelfSupervision
Device-internal messages (in particular error messages) are now accessible under the menu [Operation / Self
Supervision / Messages].
All messages that can potentially appear here are described in a separate document, the “HighPROTEC
Troubleshooting Guide” (
DOK-HB-TS
).
Supervision
The MCDLV4 supervises the phase sequence and compares it with the setting that has been made at [Field Para /
General Settings]
»Phase Sequence« (i. e. „ACB“ or „ABC“).
Under the menu [Operation / Status Display / Supervision / Phase Sequence], there is a specific signal for each CT
and VT, which is set active if the check of the respective CT / VT finds that the actual phase sequence is different
from the setting under [Field Para].
LEDs
There is a new automatic acknowledgment mode for all LEDs: The latching of all LEDs is acknowledged (reset) in
case of an alarm (from any protection module).
The automatic acknowledgment must be activated by setting: [Device Para / LEDs / LEDs group A / LED 1...n]
»Latched« = “active, ack. by alarm”
Manual Acknowledgment
It is possible to acknowledge LEDs, SCADA, binary output relays and / or a pending trip command by pressing the
»C« key at the panel. After it has been configured which items shall be be assigned to the
»Ack via »C« key«,
these are acknowledged by simply pressing the »C« key (for ca. 1 second).
Notice: If there is the need to be able to acknowledge without entering any password set an empty password for the
level »Prot-Lv1«.
1266
MCDLV4
DOK-HB-MCDLV4-2E
Summary of Contents for HighPROtec MCDLV4
Page 3: ...Order Code Order Code 3 MCDLV4 DOK HB MCDLV4 2E...
Page 47: ...Installation and Connection 47 MCDLV4 DOK HB MCDLV4 2E...
Page 164: ...Input Output and LED Settings 164 MCDLV4 DOK HB MCDLV4 2E...
Page 433: ...Parameters 433 MCDLV4 DOK HB MCDLV4 2E...
Page 457: ...Device Parameters 457 MCDLV4 DOK HB MCDLV4 2E...
Page 473: ...Blockings 473 MCDLV4 DOK HB MCDLV4 2E...
Page 988: ...Protective Elements 988 MCDLV4 DOK HB MCDLV4 2E P P Q P Q P Q Q Q P S S...
Page 989: ...Protective Elements 989 MCDLV4 DOK HB MCDLV4 2E Pr Q P Q P Qr...
Page 1023: ...Protective Elements 1023 MCDLV4 DOK HB MCDLV4 2E...
