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There are different types of alarms on HZI855:
PARAMETERS:
inside each one of the categories there can be different options like:
• V / U / F LOAD: Vsys (system avg phase to neutral voltage), F (frequency value), Uph OR (composed voltage phase-phase, counting
any of the values), Uph AND (same but counting all 3 U values above limits U12 U23 and U31), Usys (composed voltage avg), Vph OR
(same for phase to neutral voltages, counting any of the values V1 V2 V3), Vph AND (same but counting all of them), Vn (neutral
voltage).
• V / U / F SOURCES: Vsys, Vunb (vectorial unbalance, based on phase and amplitude), F, Uph OR, Uph AND, Unba (absolute phase-
phase unbalance, absolute amplitude value (no phase)), Usys, Uunb (vectorial unbalance on phase-phase voltages, based on phase
and amplitude), Vph OR, Vph AND, Vn, Vnba (absolute unbalance, absolute amplitude value (no phase)).
MAINTENANCE ALARMS CONFIG:
Allows the service (maintenance password required) to set up to 6 alarms of different or the same type.
HZI855
• Cycles Exceeded: maximum number of operation cycles of the switch reached. A cycle considers going from one position to the
opposite on and come back (for example I-II-I or I-off-II-off-I). By default it is set to 5 000 cycles.
• Operations Exceeded: maximum number of operations (change of position, including the off position (if existing) of the switching
device. By default it is set to 10 000.
• Genset runtime S1 or S2: total amount of time that the genset has been working (supplying or not the load). Can be used for genset
maintenance purposes. By default it is set to 900 000s (250h).
• Total time of genset supplying load on S1 or S2: total amount of time that the genset has been supplying the load. Can be used for
genset maintenance purposes. By default it is set to 900 000s (250h).
• Inspection time: counts the time after the last inspection (entered in “Inspection Mode” of the maintenance menu). Can be used for
periodic inspection/service purposes on the ATS. By default it is set to 300 months which is the maximum value. Hager recommends
12 months after servicing.
Consider there are also other parameters related to service (protected with Maintenance password too) inside the MAINTENANCE
menu. See chapter 11.1.9.
LOGICAL ALARMS CONFIG:
Permits up to 4 alarms using the inputs.
HZI855
SYSTEM ALARMS CONFIG:
There are 6 system alarms that can be used to detect minor failures on the installation.
HZI855
• PHASE ROTATION ERROR: If a change on phase rotation occurs, alarm will be activated.
• EXTERNAL ALARM: If an input is configured as External Alarm, this alarm will be activated when the input will be active.
• CONTROLLER UNAVAILABLE: If the controller loses the ability to perform the transfer functions this alarm will be activated (major
fault or product inhibited).
• LOAD NOT SUPPLIED: If load is not supplied by any cause, this alarm can be activated if enabled.
• RTC LOW BATT: If the RTC battery has low battery and needs to be changed, this alarm will be active.
• DC AUX SUPPLY OUT OF LIMITS: If the DC auxiliary supply is out of limits (less than 10 VDC) this alarm will become active.