hager hw+ User Manual

976LE008146B
Measurement functions
6.11 Accuracy of measurements
In its Chapter 4.8.2.3 the IEC 61557-12 standard defines the limits of uncertainty intrinsic
to the PMD device. The uncertainty is an estimate of the error percentage between the
measurement of an electrical parameter and its real value. The hw+ circuit breaker equipped
with the sentinel Energy trip unit complies with these requirements. For more information, refer
to the IEC 61557-12 version 2 standard.
The hw+ circuit breaker equipped with the sentinel Energy trip unit complies with the K70
class temperature requirements and the standard operating conditions in terms of humidity
and altitude, according to Tables 6 and 7 of the IEC 61557-12 standard.
Here is an extract from these tables.
Table 6
Assigned operating temperatures for fixed installation equipment
K55 temperature
class of the
PMDs
K70 temperature
class of the
PMDs
Kx (b) temperature class
of the PMDs
Rated operating range (with
specified uncertainty)
-5 °C to + 55 °C -25 °C to + 70 °C Greater than + 70 °C
and/or less than - 25 °C (a)
Operating range limit (no
material failure)
-5 °C to + 55 °C -25 °C to + 70 °C Greater than + 70 °C
and/or less than - 25 °C (a)
Range limit for storage and
transport
-25 °C to + 70 °C -40 °C to + 85 °C According to the
manufacturer's
specification (a)
(a) The limits must be defined by the manufacturer, in keeping with the application.
(b) Kx represents the extended conditions.
(c) The operating temperature is the highest temperature of the air in immediate proximity to the
PMD.
Table 7
Operating conditions in humidity and at altitude
Normalised
conditions
Extended
conditions
Rated operating range (with specified uncertainty) 0 % to 75 % HR (b) 0 % to more than
75% HR (a) (b)
Operating range limit for 30 days/year 0 % to 90 % HR (b) 0 % to more than
90% HR (a) (b)
Range limit for storage and transport 0 % to 90 % HR (b) 0 % to more than
90% HR (a) (b)
Altitude 0 m to 2000 m 0 m to 2000 m (a)
(a) The limits must be defined by the manufacturer, in keeping with the application.
(b) The relative humidity values are specified without condensation.
The hw+ circuit breaker equipped with the sentinel Energy trip unit also complies with all the
electromagnetic compatibility (EMC) immunity requirements and other influence variables
defined by the IEC 61557-12 standard.

hager hw+ Specifications

General

Brand	hager
Model	hw+
Category	Circuit breakers
Language	English