The programmable electronic voltage burden, type 3695 is designed for efficient testing of voltage instrument transformers. It replaces traditional burdens which are built with passive resistances and inductances.
The wide range of programmable impedances enables the emulation of most existing national and international standard burdens as well as customer-specific values.
The electronic voltage burden constantly monitors the applied burden accuracy and indicates any burden parameter deviation that may occur when testing an instrument transformer for accuracy, thereby connection and handling errors in the complete accuracy test sytem are minimized.
The instrument is protected against user setting errors, overvoltages, overcurrents and overheating. The error messages are indicated on the dot matrix display installed on the front panel of the device.
In conjunction with the type 2767 automatic instrument transformer test set and the type 4860 electronic voltage divider, the system makes it possible to integrate burdens into a computer-controlled test system.
For applications requiring apparent powers higher than 75 VA, the remotely controlled additional external passive voltage burden type 3697 expands the power range of the programmable electronic voltage burden type 3695 to 400 VA.

Advantages
• High versatility – 3695 is a universal and standardized voltage burden offering a wide burden spectrum. The built-in test frequency detection and auto-selection eliminates the disadvantage of having one instrument per power frequency value
• Accuracy at best level – 3695 + 3697 units are prepared for accuracy testing of voltage instrument transformers with most stringent accuracy requirement – These units are qualified for use in metrology institutes
• Configuration flexibility – Unit replacement is not necessary when power expansion is required, a quick and easy unit extension is available with type 3697
• Optimized investment – Many classical passive burdens can be replaced by a single electronic voltage burden type 3695
• Compatibility – Unit can be integrated with a variety of instrument transformer test sets, such as Tettex types 2767 or other makes
• Upgradeable to an automatic test system – By combination with a device type 2767 or 2769
• Optimized setting time – Unit can be quickly and easily configured for a new test using pre-defined burden values from applicable standards or user defined set of values

Applications
• Voltage instrument transformers (LV/MV/HV)
• On-site testing of high voltage instrument transformers
• Metrology institutes
• Research and development