Littelfuse 233P-1.5-ENCL - The 233P1.5-ENCL is an enclosed single-phase pump monitor with an input voltage value of 230 V ac, an input load range of ⅓–1.5 hp, and an output load rating of 1.5 hp @ 240 V ac (10 A maximum).
Littelfuse

233P-1.5-ENCL

Alternate Item Number: 233P-1.5-ENCL

UPC: 079458990348


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Overview

The Littelfuse 233P-1.5-ENCL is a single-phase pump monitor designed for reliable motor and pump protection in industrial applications. Operating at 230 VAC, this unit offers a versatile input load range from ⅓ to 1.5 horsepower (hp) and features an output load rating of 1.5 hp at 240 VAC with a 10 A maximum current. Its robust NEMA 3R enclosure provides essential protection against dust and moisture, making it suitable for challenging environments. The 233P-1.5-ENCL incorporates advanced microcontroller-based circuitry for constant monitoring of voltage and current. Key protective features include overcurrent protection (trip delay of 5 seconds), underload (dry-well) protection (adjustable from 70-90% of calibrated run power with a 4-second trip delay), overvoltage (265 VAC) and undervoltage (190 VAC) protection (2-second restart delay). It also provides rapid-cycling protection, limiting restarts to 4 within a 60-second period. The unit includes an onboard calibration process to adapt to specific pumping applications and reduce nuisance tripping, along with a sensitivity adjustment knob for dry-well trip points. Dimensions are 73.66 mm H x 133.35 mm W x 73.99 mm D. It is cUL Listed and UL508 compliant. Applications include municipal water and wastewater, agricultural irrigation, HVAC systems, industrial process pumping, and sump/sewage pumps. The optional Informer diagnostic tool (sold separately) can access parameters like calibration points, trip points, run time, and last faults via an infrared receiver. The Littelfuse 233P-1.5-ENCL ensures extended equipment life and optimized performance for critical single-phase pump operations. Current transformers (CTs) are sold separately for load ranges beyond the direct sensing capability, with options for 7.5hp, 10hp, and 15hp applications.
  • Microcontroller-based circuitry for constant voltage and current monitoring
  • Adjustable underload (dry-well) protection from 70-90% of calibrated run power
  • Overcurrent protection with a 5-second trip delay
  • Overvoltage (265 VAC) and undervoltage (190 VAC) protection with 2-second restart delay
  • NEMA 3R enclosed for dust and moisture protection

Specifications

Brand Name
Littelfuse
Current Rating
10 A
Mounting
#8 screws
Number Of Poles
#8 screws
Operating Temperature
-40 to 131
Operating Temperature, Maximum
131
Operating Temperature, Minimum
-40
Pickup Voltage
230 V
Series
233P
Special Features
5YR WARR
Standard
UL
Sub Brand
Symcom
Voltage Rating
230 V AC
Package Dimensions (L x W x H)
3.68 IN x 5.36 IN x 8.3 IN
Package Dimensions (L x W x H)
93.5 mm x 136.1 mm x 210.8 mm
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Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.