20 Device Description
WAGO-I/O-SYSTEM 750 XTR
750-495/040-00x 3-Phase Power Measurement Module 690 V
Manual
Version 1.2.0
The 750-495/040-000 I/O module measures currents up to 1 A, the
750-495/040-001 version measures currents up to 5 A, and the 750-495/040-002
measures currents up to 500 A (RT500) and 2000 A (RT2000) using Rogowski
coils.
With firmware versions 03 and above, RC70, RC125 and RC175 are also
supported for measurements up to 4000 A. Firmware versions 05 and above
support user-defined coils.
The input of the 750-495/040-002 version processes secondary voltages of
Rogowski coils up to 88 mV
RMS
AC. The maximum primary current resulting from
this is calculated according to the following formula:
𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃
𝐶𝐶𝐶𝐶𝑃𝑃𝑃𝑃𝐶𝐶𝐶𝐶𝐶𝐶
𝐴𝐴𝐶𝐶
𝑚𝑚𝑚𝑚𝑚𝑚
.
=
0.5
𝑉𝑉
8 ×
𝜋𝜋
×
𝑓𝑓
𝑁𝑁𝑁𝑁𝑁𝑁𝑁𝑁𝑁𝑁𝑁𝑁𝑁𝑁
×
𝑀𝑀
𝑅𝑅𝑅𝑅
×
22
𝑘𝑘𝑘𝑘
22
𝑘𝑘𝑘𝑘
+
𝑅𝑅
𝑅𝑅𝑅𝑅
×
1
√
2
Explanation of the factors:
MRC: Mutual inductance in henries [H]
R
RC
: Internal resistance in ohms [Ω]
Always use current transformers
For measuring current, it is essential to use current transformers.
For line voltages U
LN
≤
400 V, current transformers with basic insulation are
required. For line voltages U
LN
> 400 V, current transformers with reinforced
insulation are required.
Otherwise, touch-proof protection from the system may no longer be given in the
event of a fault. This can cause electric shock or burns. Furthermore, current
measurement without a current transformer can lead to a short circuit in the
power network and destruction of the I/O module.
Pos: 24 /Serie 750 ( WAGO-I/O-SYST EM)/Wichtige Erläuterungen (al te Str uktur)/Sicherheits- und sonstige Hinweise/Hinweis/Hi nwei s: Potenti alei nspeisemodul ei nsetzen! ( keine LK) @ 3\mod_1226499089640_21.docx @ 25026 @ @ 1
Use a power supply module!
Use a power supply module for field-side power supply of downstream I/O
modules.
Pos: 25 /Serie 750 ( WAGO-I/O-SYST EM)/Wichtige Erläuterungen (al te Str uktur)/Sicherheits- und sonstige Hinweise/Hinweis/Hi nwei s: XTR - Mischbetrieb XTR /Standar d @ 15\mod_1367496420828_21.docx @ 118326 @ @ 1
Mixed operation
Mixed operation (standard/XTR modules) within a node is possible when groups
of modules are electrically isolated on the field side (i.e., electrically isolated
power supply).
Pos: 26 /Serie 750 ( WAGO-I/O-SYST EM)/Ger ätebeschrei bung (alte Str uktur)/Ei nleitung/Ei nsatzber eich/Ei nsatzber eich 750- xxxx/040- 000 alle XTR-Koppl er/C ontroller ohne Einschr änkung+Mischbetriebhi nweis @ 32\mod_1532012421157_21.docx @ 491879 @ @ 1
The I/O module can be operated with all fieldbus couplers/controllers of the
WAGO-I/O-SYSTEM 750 XTR.
Observe the instruction for mixed operation when used in mixed operation behind
standard fieldbus couplers/controllers.