Gas High And High-High Alarms; Table 10-3 - Possible States Of The Hydran 201Ci-1'S Display And Alarm Indicators - GE Hydran 201 i Instruction Manual

Chapter 10 • Alarms
status of the gas alarms. Each push-button turns on when the corresponding alarm is
triggered. The push-button's alarm indicator is latched; in other words, it remains on
even if the alarm condition has disappeared and even if the alarm is acknowledged
(using the H201Ti's keypad or the Hydran Host software). To turn it off, you must
press the corresponding push-button; an alarm indicator can only be turned off if the
alarm condition has disappeared during a period of time exceeding the corresponding
alarm delay (one of the alarm parameters). Table 10-3 on page 10-8 lists the possible
states of the Hydran 201Ci-1's display and alarm indicators.

Table 10-3 - Possible States of the Hydran 201Ci-1's Display and Alarm Indicators

State
Normal
High alarm
High-High alarm
Fail alarm
Power failure
6. During a fail alarm, the Hydran 201Ci-1's display is blank (see Table 10-3 on
page 10-8), and the analog outputs of the H201Ti and the H201Ci-1 drop to 4.00
± 0.10 mA.
7. A message is recorded in the H201Ti's History;Events file. Alarm messages are thus
stored in memory. The Events file can contain up to 500 messages. Each message
comes with a set of relevant parameters (gas level, trends, etc.) and is identified with
the recording date and time. For details, see Section 4.5.1 on page 4-12.
10.4

GAS HIGH AND HIGH-HIGH ALARMS

Parameters pertaining to gas High and High-High alarms are set in the Hydran 201Ti's Gas
submenu. For explanations on each parameter, see Section 4.5.2 on page 4-16.
Set points for High alarms should be adjusted at values that indicate that the transformer (or
other equipment) requires closer monitoring. Set points for High-High alarms should be
adjusted at values considered as critical by the user, meaning that the transformer requires
immediate action; in general, this alarm implies an evaluation of the equipment and its
possible removal from service.
10-8
Display High Indicator
Off
Normal On (Latch)
On
Unchanged
Off
Off
Rev. 6, March 2011
High-High Indicator
Off
On (Latch)
Unchanged
Off
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