METREL MI 2893 User Manual

MI 2893 / MI 2892 / MI 2885 EN 50160 Standard Overview
212
Residual
voltage
Duration (ms)
10 ≤ t ≤ 200
200 < t ≤ 500
500 < t ≤
1000
1000 < t ≤ 5000
5000 < t ≤ 60000
90 > U ≥ 80
Cell A1
Cell A2
Cell A3
Cell A4
Cell A5
80 > U ≥ 70
Cell B1
Cell B2
Cell B3
Cell B4
Cell B5
70 > U ≥ 40
Cell C1
Cell C2
Cell C3
Cell C4
Cell C5
40 > U ≥ 5
Cell D1
Cell D2
Cell D3
Cell D4
Cell D5
U < 5
Cell E1
Cell E2
Cell E3
Cell E4
Cell E5
5.2.9 Voltage swells
Voltage swells are typically caused by switching operations and load disconnections.
Conventionally, the start threshold for swells is equal to the 110 % of the nominal voltage. Collected
voltage swells are classified according to the following table.
Table 145:Voltage swell classification
Swell voltage
Duration (ms)
10 ≤ t ≤ 500
500 < t ≤ 5000
5000 < t ≤ 60000
U ≥ 120
Cell A1
Cell A2
Cell A3
120 > U > 110
Cell B1
Cell B2
Cell B3
5.2.10 Short interruptions of the supply voltage
Under normal operating conditions the annual occurrence of short interruptions of the supply voltage
ranges from up to a few tens to up to several hundreds. The duration of approximately 70 % of the short
interruptions may be less than one second.
5.2.11 Long interruptions of the supply voltage
Under normal operating conditions the annual frequency of accidental voltage interruptions longer than
three minutes may be less than 10 or up to 50 depending on the area.
5.2.12 MI 2893/MI 2892/MI 2885 recorder setting for EN 50160 survey
MI 2893/MI 2892/MI 2885 is able to perform EN 50160 surveys on all values described in previous
sections. In order to simplify procedure, MI 2893/MI 2892/MI 2885 has predefined recorder
configuration (EN 50160) for it. By default, all current parameters (RMS, THD, etc.) are also included in
survey, which can provide additional survey information. Additionally, during voltage quality survey user
can simultaneously record other parameters too, such as power, energy and current harmonics.
In order to collect voltage events during recording, Include events option in recorder should be enabled.
See section 3.23.2 for voltage events settings.

METREL MI 2893 Specifications

General

Brand	METREL
Model	MI 2893
Category	Measuring Instruments
Language	English